I don't get it, but some how, for some reason, some folks think that it's a "gray area". Preemption prohibits local units of government from enacting rules or regs more restrictive on guns than state law.
Colleges, for the most part, are funded by tax dollars, and patrolled by regular cops. Some have the ability to enact ordinances with the weight of law. How in the hell anyone could think that preemption doesn't apply, I don't get it. But it's seen as a gray area, because the term "college" isn't used in preemption, and I don't believe any schools have been justly sued yet.
Since it is considered a gray area, it could apparently take a legal battle to defeat charges or fight an expulsion from a school.
I firmly believe that it is our place to go around to different colleges explaining the law, and explaining that their rules are out of line. It would seem that way anyway, since we're the nerve center of OCing, and that's the only way to carry in a classroom.