Firstly, thank you all for your suggestions. Secondly, I know for a fact that he is a rapist. One of my good friends talked to *one* of the women he raped. Although, she wasn't actually raped, it was attempted--she said (posted to Is it uncouth to "out" a rapist?)
I agree with the advice to talk to the women who were victims - and the ones who had to fight him off because that is still a sexual assault even if they were not raped. I would give them (posted to Is it uncouth to "out" a rapist?)
Create a new email account. Register for Facebook with the new account. Don't tell anyone about the new account. Then there can be no slander/libel suit. Its possible, if things go far enough, for you to be tracked through things (posted to Is it uncouth to "out" a rapist?)
I just think it's such a shame to live in a society where the aggressors have more rights than the victims. Where the police usually side with the aggressors because it's so hard to prove these things. That because there (posted to Is it uncouth to "out" a rapist?)
There are a lot of good suggestions here, and I suggest you do what you feel comfortable with. I also suggest you talk to an advocate (crisis counselor). They aren't just there for survivors, they are there for everyone, because (posted to Is it uncouth to "out" a rapist?)