>>After the little fuckers are taught to wear their hats properly, they should be trounced until they find out that wearing hats in people's houses is a no-no. Then give them the lash.<<

While this was a darned good chuckle (as was Book'm, Dano), I think the serious approach, suitable for the class assignment, is more as dianavan says. Prevention and education.

Send them to Australia until they are 21, and call it a cultural exchange program.