why don't they wear the wind-resistant suits that skiers (sp?) wear when they are competing in a race? They wear these baggie "hipster" clothes (to play off another thread) and it would seem one person would wise-up and go aerodynamic on their ass...

Yeah that really is a good point. The answer probably has to do with sponsors (and money). One would think something more "aero-dynamic" would really provide a significant advantage over the competition.

Because it's not cool

Probably the same reason why skate boarder contine to wear shorts and short sleeve shirts (even with pads) instead of pants. It's not a part of the culture I guess.

why would skateboarders where pants/long sleeves...they'd rip them if they fell