Fuck this was interesting. My mom is a therapist that worked in foster care, rehab, and now marriage& family therapy mostly with young adults and kids. This problem presented itself throughout all those fields.
There's a documentary about the problem called The 13th Step that I would recommend. I go to AA plenty and men who do this are the worst kind of people. It even becomes a joke in the program. I'd be lying if I said I'd never made one of those jokes but I think mine were in good taste and directed at pieces of shit who'd do it. Not that that's a good way to deal with the problem but it's so big there's not really anything to do about it.
Isn't it kind of "really bad" to allow people who are known to prey on people trying to get help through AA, to stay in your group? I don't know how AA works honestly, but I feel like they ought to be removed from the meetings or whatever.. edit: I suppose it's hard to charge someone in engaging in sexual predatator-ness in such an informal setting, even if everyone "knows" the problem-person's behavior.