So I was thinking...
It never really made sense to me that GhostChristian (here after just called Christian) was just an apparition of the MIB. Yes, the MIB took credit for the appearances of Christian, but he has been shown to lie a lot (almost any time he spoke) so we can't take his word on the subject as fact.
Also, some (if not all) of the stuff Christian got the Losties to do seems to go against what the MIB's final plan was. So if it was the MIB then the MIB was seriously stupid and did not know what he was doing.
First, getting Locke to move the Island the first time (when Ben did it) would have ended up with Locke being off Island, possibly never to return. And the MIB apparently needed(or at least really wanted) Locke to assume his form. And if the MIB actually meant for Locke to get Ben to move the Island then Ben would have been off the Island, possibly never to return so he wouldn't be there to kill Jacob, and it's pretty obvious the MIB needed Ben to kill Jacob since he probably couldn't find or trick anyone else into killing him (no one else was angry enough at Jacob to do that).
The second time the Island was moved Christian told Locke to "Say hello to my son", which would seem a bit out of character for the MIB to say, not only since Jack wasn't his son but also it seems a bit to "friendly" a thing to say.
Also, the Island was way back in the past at this time, perhaps even pre-MIB being on the Island, and definitely before Christian's body ever ended up on the Island, so unless the MIB was also time jumping, the "current" MIB (if he was even on the Island at the time) wouldn't know to take that form, or who "his son was" or even know/want Locke to move the Island/stop the time jumps.
And, again, by taking Locke off the Island he would have no idea that he would ever/could ever get back to the Island and if Locke was a major part of his plan then that would be a big risk.
So, unless the MIB existed out of time. So he knew the past/present/future all at the same time, all the time (something we haven't seen him to actually know, otherwise he would know how he was going to die, etc... and wouldn't do what he did), so that his ancient pastself, knew what his present day self knew it makes no sense for some of the appearances of Christian to be the MIB.
But... We do know that real ghosts do exist on the Island. Michael was one of them. They were what the whispers were.
We also know that time has no meaning in the afterlife, as explained to us by Christian in the final episode.
So a ghost on the Island might exist outside of space/time, being able to appear at any point in time.
Also, ghosts, including Christian have appeared off Island, something apparently the Smoke Monster couldn't do.
So, maybe the appearances of Christian on the Island were actually the ghost of the real Christian, not the MIB in disguise.
That would make more sense.
First, the first time he asks Locke to move the Island would either get Locke to safety (or Ben off the Island), either way it would get at least one of them out of the MIB's reach and possibly foil the MIB's plans.
Also, moving the Island at that time prevented Jack, Sayid, Sun, Hurley, Aaron, Frank & Desmond from returning to the Island. So it also got them out of the MIB's reach for a time.
The second time he got Locke to move the Island, it was to save the lives of those people time jumping who would have died if Locke hadn't fixed the wheel, stopped the time jumps and moved the Island again.
It would also make sense for him to say: "Say hello to my son." at this time.
Also, if he did in fact exist outside of time (being from the afterlife) he would know what would happen (so he knew Locke would see Jack again) and also that they would all return to the Island and finally stop the MIB.
So all in all, it makes much more sense for Christian to be a real ghost, trying to help his son (and Jacob), rather then being the MIB in disguise making stupid decisions that could potentially ruin his master plan.
It never really made sense to me that GhostChristian (here after just called Christian) was just an apparition of the MIB. Yes, the MIB took credit for the appearances of Christian, but he has been shown to lie a lot (almost any time he spoke) so we can't take his word on the subject as fact.
Also, some (if not all) of the stuff Christian got the Losties to do seems to go against what the MIB's final plan was. So if it was the MIB then the MIB was seriously stupid and did not know what he was doing.
First, getting Locke to move the Island the first time (when Ben did it) would have ended up with Locke being off Island, possibly never to return. And the MIB apparently needed(or at least really wanted) Locke to assume his form. And if the MIB actually meant for Locke to get Ben to move the Island then Ben would have been off the Island, possibly never to return so he wouldn't be there to kill Jacob, and it's pretty obvious the MIB needed Ben to kill Jacob since he probably couldn't find or trick anyone else into killing him (no one else was angry enough at Jacob to do that).
The second time the Island was moved Christian told Locke to "Say hello to my son", which would seem a bit out of character for the MIB to say, not only since Jack wasn't his son but also it seems a bit to "friendly" a thing to say.
Also, the Island was way back in the past at this time, perhaps even pre-MIB being on the Island, and definitely before Christian's body ever ended up on the Island, so unless the MIB was also time jumping, the "current" MIB (if he was even on the Island at the time) wouldn't know to take that form, or who "his son was" or even know/want Locke to move the Island/stop the time jumps.
And, again, by taking Locke off the Island he would have no idea that he would ever/could ever get back to the Island and if Locke was a major part of his plan then that would be a big risk.
So, unless the MIB existed out of time. So he knew the past/present/future all at the same time, all the time (something we haven't seen him to actually know, otherwise he would know how he was going to die, etc... and wouldn't do what he did), so that his ancient pastself, knew what his present day self knew it makes no sense for some of the appearances of Christian to be the MIB.
But... We do know that real ghosts do exist on the Island. Michael was one of them. They were what the whispers were.
We also know that time has no meaning in the afterlife, as explained to us by Christian in the final episode.
So a ghost on the Island might exist outside of space/time, being able to appear at any point in time.
Also, ghosts, including Christian have appeared off Island, something apparently the Smoke Monster couldn't do.
So, maybe the appearances of Christian on the Island were actually the ghost of the real Christian, not the MIB in disguise.
That would make more sense.
First, the first time he asks Locke to move the Island would either get Locke to safety (or Ben off the Island), either way it would get at least one of them out of the MIB's reach and possibly foil the MIB's plans.
Also, moving the Island at that time prevented Jack, Sayid, Sun, Hurley, Aaron, Frank & Desmond from returning to the Island. So it also got them out of the MIB's reach for a time.
The second time he got Locke to move the Island, it was to save the lives of those people time jumping who would have died if Locke hadn't fixed the wheel, stopped the time jumps and moved the Island again.
It would also make sense for him to say: "Say hello to my son." at this time.
Also, if he did in fact exist outside of time (being from the afterlife) he would know what would happen (so he knew Locke would see Jack again) and also that they would all return to the Island and finally stop the MIB.
So all in all, it makes much more sense for Christian to be a real ghost, trying to help his son (and Jacob), rather then being the MIB in disguise making stupid decisions that could potentially ruin his master plan.