actually alot of companies are doing similar things , they are tracking returns and such to prevent people from working the system, a guy i used to work with would get various dvds online and at different retailers with high discounts then turn around and return them at wallmart for full price ( their return policy was really lax), eventually they banned him from doin returns ( and he wasnt goin to just one store ) . and amazon isnt going to hurt their bottom line banning one guy for buying multiple copies of whatever, if its a popular game its goin to sell regaurdless, i dont think they did for moral reasons either. mostlikely they dont want bad press like namco-bandai is goin through with Ni no Kuni recently so they nip this in the bud when they catch it, could they have warned the guy? sure they could but im sure what he was doin is in the T&C somewhere and thats all the "warning" any service needs to give