Even when you want to report them, you can't :/ they teleport too fast to check their character name.
(i remember getting dm from GM asking if i was a bot when hunting, maybe they do check for bots even if it's just a little)
seriously, there are maps where the GM can just sit 10-15 mins a time and they will catch multiple bots.
Maybe some programs they use have an "avoid GM" sort of crap but they probably could as easily sit with a non-GM sprite character then PM them using the GM spirited characters