Well, if you believe the hackers' motivation for doing this, I don't think it's about producing an overall net positive effect at all, just righting some percei

Well, if you believe the hackers' motivation for doing this, I don't think it's about producing an overall net positive effect at all, just righting some perceived wrongs. The perceived wrongs are not that AshleyMadison enabled married people to cheat on their spouses. What the hackers have said was their motivation is that AshleyMadison has lied to their users about the userbase, which is supposedly 90+% male, most of which have likely not engaged in an affair since most of the accounts they would interact with are supposedly fake. I don't think a net positive effect can come from this.