Drama will never be stopped anywhere in the world, so the best thing to do is learn how to react to "haters". If you're standing up for a friend who you believe needs it, then you should be able to explain that to your "friends" that get mad.
Don't listen to "news", gossip, rumors, or any stories about your fellow students. *** Did you know?: it's considered a sin, in the Jewish religion, to speak about someone who isn't in the same room with you.