They need to take action. Player base is already leery... with bots controlling market it will seriously hurt the player base. Will make people do a 360 and walk away. ps... the gen chat is so horrible rofl.
Not a lot of work for a bot... its very simple really. Lots of profit to be made like that. The only other thing it could be is if Cryptic/Perfect World was injecting Zen and AD into the market. That would be highly F'ed up but being how we can not see who is placing the buy/sell orders it cant be ruled out.