I often think that some teachers deliberately set out to demonstrate the evils of alcohol, cigarettes, "American" food, etc.

A teacher that comes to school in ripped pink jeans, flip flops, and reaking of alcohol at 09:00 (NOT ME) is probably the most effective warning against decadent western habbits, LOL.

I sometimes say to my kids when we see a drunk stumbling or sleeping in the road, "Look what happened to that man, because he wouldn't do his homework when he was a kid!"

Probably not the truth, but it makes them think.