There was an army of THM bots near Scorp crossing newr horizon a few months ago, all very low level, all identical gear, all following exact same path and attacking same mobs.
Called a GM, a nice one infact, who actually came to the location. I got the "they could be legitimate players and be friends playing with each other" despite if u hit trade they would lock out, and some got stuck on rocks for hours
You can find same group at MD zone in from Coerthas nowadays queuing for dungeons, all 50