WSG CTA is only good if your BG/faction wins at least 50% of the time. I ran it a month or so ago running a resto druid, using Kaboomkin healbot, and I never got called out as a bot. All you need is a CC that sticks near other players and you are golden.
I have used bot in all BG's, and can't relly see what the problem is..
From time to time it's even playing the game better then your team.. >.<
Just be sure to look up on it, see if there is any problems..
Other then that, you should be good to go..