The only error that i got when abusing aimbot, is 18_1, when shooting throught glasses or metal grids, happens to me quite rarely, but happens. never got 30_0 error... despite that to this hack in particularly the website that releases it has in it's release page ''don't use aimbot too often or you will get client error 30_0'' something like that. I guess Crossfire Europe doesn't detect it.