Where does it suggest that people with a higher rank are more important? It's simply a place for people who have a certain of number posts to talk with each other - there's the Lower Decks forum, where newbies can help each other, there's the Admiral's Forum, where old-timers can remember the old BBS days, but they're not better or worse than anyone else.
In a way, this might actually discourage spamming. Going up in rank does mean that you will be able to access another Lounge, but it also means that you will no longer be able to access your old Lounge, so it's a very bittersweet advantage. If some of your friends or some interesting threads are in the old Lounge, you will no longer be able to read them. That's also something to consider.