I'm kind of curious as to whether or not the STF even bothers doing the tried but true "Send a tell" method of identifying bots, because it's probably the most quick, simple and reliable method of weeding them out, because only a fool is going to ignore repeated tells from a GM or some other authority.

Granted, some bots are simply being run in another window while their owners play a different game or on their main account and can still respond to tells, but the majority of them are being run while there's no one there to respond.