[pTK]

I believe it's do to Bhopping in 1.5/1.6  ,  Bhopping wasn't nearly as easy in those. As I recall it was nearly impossible to sustain in 1.6 without scripts.  Anyone doing it meant they spent alot of time on the game and were probably really good.  It was a sign of status and that carried on to other versions of counterstrike.

AND IT FUCKING LOOKS COOL.