I think sv_pure 2 as its configured right now is just an annoyance. Essentially all it does is stop sprays and custom character models for noobs. My opinion is its better to leave people their mods and sprays and ban people that are cheating or ruining the game by hand.

sv_pure 2 isnt enough to stop the simplest of material wallhacks, it just takes some fun out of the game. You either have to use sv_pure 1 which would theoretically pull every map, model, and material down from the server every time. That comes along with no one w/ custom weapon skins being able to use them. I've heard even that can be bypassed anyways by simply setting your folders to read only amongst other ways.

There's so many admins and the best defense is a human eye, i think its safe enough to leave sv_pure at 0 anyways.