If you had a chance to expose some horrible things, but could be harmed for doing it, would you?

I'm in a situation where I can let my campus- via the newspaper- know about some horrible things a fraternity on campus is doing, anonymously, but I could take some serious heat if they figure out it was me. I've already been threatened with to keep my mouth shut. My choices seem to be that I can keep other women from getting into bad situations, but put myself in danger, or I can keep my mouth shut and let whats going on continue. What would you do? What do you think I should do?