Originally Posted by Sniggles
Cannabis is a prohibited substance, much like meth, coke and painkillers. They are disallowed because they feel compelled to police what the fighters are doing in their personal lives.
I see it more as the UFC/NSAC/etc covering their asses in case some fighter get seriously injured while fighting/training on meth/coke/etc. If they didn`t test and prohibit those substances and a fighter got injured in a fight while on coke, they could possibly find themselves in a lawsuit concerning fighter safety. Likewise if you were fighting a guy on meth and he seriously injured you, you could sue the NSAC for negligence. I`d rather see a big name guy get busted for weed and suspended than see a fighter a little slower on his reaction time due to weed get seriously hurt.