Is it wrong to tell your friends that your other friend has an STD if those friends could potentially make out and/or have sex with your STD'd friend, KNOWING full well that he does not believe in the use of condoms nor would he actually confess to having an STD because he's a horrible person most of the time? I don't want to betray him or like spread the rumor because it's personal, but at the same time he has freaking HPV and my friends could get it and THAT would be even worse.
I don't trust him to tell anyone...he's....ugh. SHADY BEYOND BELIEF. I'm not going around telling the world, just people I know that would make out with him and/or other things if they had one too many. He's not ruining my friends' lives just because he likes to have random sex and not be protected EVER whilst doing it.
Tell them. As soon as possible. If it was something like the clap where a shot of penicillin would nix it, I might be a little less inclined, but he does have FREAKIN HPV, which can potentially turn into CANCER, so yeah. Tell them.
My advice would be to talk to him first. This is a serious matter--and if it's obvious that he's not going to be the mature one in the relationship (or whatever it is he's engaging in), then you should take the second course and tell your friends.