Wow, my heart goes out to your and your friends, I too was a conjure woman attending a Catholic university. However, I was a very outspoken Pagan and practitioner, to the point of going around and giving speeches about the truth behind the negative propaganda aimed at my kind and what we do. It went over rather well (save for a few ignoramus', but you always get a few, right?). I had altars and herb cabinets and whatnot in my dorm room, and nothing ever came of it (except for lots of students coming to me for all kinds of things at all hours, lol).
What's happening in your school is illegal, it's religious discrimination, it's causing you emotional distress (something that people sue for millions of $$$ over), and you've been vandalized based on accusations (as in, no probable cause).
I agree with Cat, document EVERYTHING, and threaten (but mean it) to go to the press and social action groups with your story. Even better, threaten a lawsuit for the vandalism, discrimination, and emotional distress (and cite the Civil Rights Act). Nobody wants to catch a case or shell out for a legal team, so if you show you're serious, they might just back off.
Once again, I'm so sorry for what they did to you, that was flat out discrimination
