All the soapboxing aside, the reality of it is...unless you actually feel like your life is in danger, or your school is in a really bad area, it might just be worth giving in and being a defenseless sheep for a year or two. Is your educational and employment future worth making a point about a stupid rule?
I know that won't be a popular opinion, but take it from someone whose interviewed enough people for jobs - if they were expelled from a school, and I asked why and they said something like "Oh, my school had this stupid rule that you weren't allowed to have guns while you attended, but I thought it was dumb/violation of my rights/whatever, so I just brought my guns up anyways", you can bet they're not getting a call back. What happens when they think safety rules about how to operate our heavy machinery are stupid and they don't have to adhere to the OSHA contracts they signed? Or that the hours they signed up to work "were stupid and a violation of their rights to come and go as they pleased" and we lose thousands of dollars because trucks don't get unloaded?
Sometimes you have to deal with stupid rules. It sounds like your school actually enforces this rule, so all the more reason. Buy a taser or an asp baton and rely on those for a few years, or if it's that odious to you, make sure your GPA is good and find another school with an equally good program in what you're studying and transfer. Part of growing up is having to deal with rules you don't like or think are stupid. A man takes the rules in stride, follows them, and works to change them and educate others. A child breaks them. Think about all the bad press gun owners will get at your school if you show up on facebook with a gun and they publish some article about "Right-wing extremist brought multiple military assualt-type weapons to school!". Now you're expelled, and any responsible gun owners who attend the school for years to come have public opinion thinking they're nut-jobs.
Not worth it, imho.
Also, +1 to keeping your facebook professional. If you wouldn't let your parents see it, you should probably clean it. No one cares if you like doing keg-stands on weekends, but employers are going to think you're an irresponsible dumbass if your profile is public and they see pictures of it.
Also, thank god for going to a hick college like mine
. UC Davis had such a backlash that students couldn't have guns in the dorms when they moved that they had to implement a free program where you would let the campus police hold your guns and you could go get them whenever you wanted for hunting or target shooting shooting or whatever. Still not as good as...not living in CA, but better than just about anywhere else in the state.