Update:
http://www.outpostnine.com/editorials/teacher104.html
Sure, other teachers can get on that 8PM train back home and say "I'm tired," but they can't say their students liberally kicked/punched them, spent the whole class period listening to rap music in the back of the class, and told them to "**** off" in English when they were politely asked to maybe please do their homework.
We keep spendin' most our lives, living in the Ghetto Paradise...