If you read what I wrote, I actually agreed with you about the course of action the OP took. What I had a problem with is the way you attack people and immediately claim the moral high ground and dismiss others as "low class" individuals. Some people have difficulty articulating themselves and sometimes comments are misconstrued. I'm sorry to say it but you're clearly the aggressor in this case, riding in with your shiny armor on your white steed, calling every male who posted a "juvenile teenage girl" and insinuating that all white males are neanderthals.
Anyway, I think I've said enough in this thread so I'll withdraw from it now.
killadoob, I agree with what you said and I think you did the right thing, for what it's worth.
Pitbull, I see what you're saying and I agree with a lot of what you say as well. In this specific case, however, there wasn't an option. I wouldn't allow a friend to sleep with an aids infested prossie in the first place but if he did and he didn't tell his girl on his own, I'd feel obliged to do so. Think about it this way, he could have saved a life!