Besides capcha, sure. some of these real humans fail. I can on long bad days lol.
I have a solution I presented in cata series when this was the whine of the day when that redo came out.
Prices fixed AH. 3 times vendor price is max price on AH.
20 stack to vendor 50 silver. 1.5 gold on the AH max. Sword of doom sells for 1 gold. 3 gold on AH.
It removes the other cause of bot gold. A 60 can make that 3 gold real fast. No need to look at 3rd party.
As the AH is now clearly the other source if RMT in this game some forget about. GDKP is removed after all yet bots are still here.
and so are the 40 gold stacks of mats on the AH. and the 500 gold swords of doom.
Have ah force reasonable profits average buying players can make in game, and maybe we see the bot gold need go away.