I don't see why switching off would automatically mean rebooting. It doesn't mean that for my PC here...
As for "abuse", that's all in the eye of the beholder. Humans are being subjected to all sorts of things they don't exactly volunteer for, like paying taxes, stopping at red lights, or refraining from vivisecting cute puppies. Moral outrage at such coercion and inhibition varies with time and place.
The thing different with artificially created life (whether holographic or biologic) is that the creation process might already be considered so complex and demanding that the further ability to "program" the end product might be considered a trivial addition to the process, or indeed a solid and necessary part of it. Hence, artificial sapients could honestly enjoy being abused, and might suffer from not being abused.
Although that's not such a big difference, really. Regular humans can probably be "programmed" that way, too, once our technology and knowledge evolves a bit more. And humans today certainly enjoy being abused in certain ways and suffer from not being abused - it just depends on the definition of the day for abuse (say, an underage girl might really love having frantic sex with older boys every day, and hate the dirty old men at the legislative body who reserve the right to tell her when to open her legs).
Also, AI in many a piece of speculative fiction is not "programmed" at all, but left to emerge at random. Say, Asimov's positronic brains were "born" despite being built - the manufacturer had little control over the finer detail of the thought processes that would result when the switch was first flipped. So there wouldn't be a fundamental difference between positronic robots and flesh-and-bones humans in Asimovian stories in that respect; robots weren't "programmed", they were trained (and indoctrinated with the Three Rules, to varying degrees of success, but such indoctrination did not extend to other areas such as making a particular brain fanatically enthusiastic about running a combine harvester).
Timo Saloniemi