My 12 year old's school allows swearing, and while it is curiously disturbing to hear a six year old swearing like a sailor while playing a video game, it is interesting to see what happens to the older kids as the novelty wears off. I allow my child to swear, but he respects which words I would rather not hear around the house, and I've never heard him swear when it was inappropriate. So, I teach my son how not to be banned.