"Why are Mac Users such pirates anyway?"
Who are you to judge? They're no worse (and I suspect a lot better) than the PC crowd.
Most mac users I know pay shareware fees. Practically no Windows users I've ever met pay shareware. What was that paint program on windows that could take screen captures? SuperPaint or something? Every windows shop I ever worked at had it on every machine but none - not one - had ever licensed it. They just used it for screen captures for documentation.