I, personally use a lot of custom skins in CS:S, and am disappointed that my favourite servers have it disabled by having
sv_pure as 1. I, and a lot of others, would greatly appreciate it if you could add it into your server

if sv_pure is set to 0, how are we gonna catch wallhackers?

do it ! do it!

I'm more than sure there are other ways to find out things like people hacking such as further plugins.
sv_pure 2 = Forced default models/skins
sv_pure 1 = Some are forced default, not all.
sv_pure 0 = ^
sv_pure -1 = All skins work perfectly

Although, People are right about detecting hackers, this'll make it harder :C