Interjection, no I’m not afraid of individuality, I’m afraid of negative influences. Of course I try to be a good role model; that is indeed the single most important part of chinuch, but my responsibility does not end there.
Having spoken to mechanchim about the issue, it is clear that children who have been exposed to filth have a harder struggle with the yetzer hora as adolescents than those who haven’t (whose struggle is hard enough as it is).
You are also pretty naive if you think these kids are only exposed to a “weeny” bit of filth. It’s much worse than that. (This is not a guess.)