Well so rip open trading and game soon bots will destroy it as they did with d2 and many other games i would love to have system that is punishing bots but it didnt happen in d2/d3 and it wont happen in d4. By not giving ppl chance to trade outside AH they would at least reduce damage that bots does to economy in game. Involving real money you involve additional currency that is providing to inflation way faster than without it.