Hacked Items

There exists the same issue in Diablo II where a high fraction of all items and currency are illegit dupes. People stopped caring, other than the fact that the items could disappear on you, merely because their money goes towards getting an item they need in which they're paying the correct price for. You can't tell it's counterfeit, you're paying retail price, only difference is who's gaining the profit. Of course it's illegit though.