They would accomplish more, and quicker just by going to those places where bots frequent, observing for a few moments to see who is a bot, locking those accounts then and there to have their trade history researched, and then proceeding to the next spot. RMT, even if a portion comes from hacked accounts, cannot continue working without an army of bots generating more money and materials for them to sell so that they can then hack those accounts. Eventually the supply would dry up or RMT would need to seek out less efficient means. Once it stops being profitable, RMT will go to another game.