Especially after someone figures out how to dupe (duplicate) items in-game.
Ah... Fond memories of duping items in the original Diablo game -- Obsidian Ring of the Zodiac, Godly Plate of the Whale, King's Sword of Haste...
=]
Does WoW have duping problems? I was under the impression that it was the particular way D2 handled items[1] that allowed duping, not a necessary part of any game.
[1] Probably at the time, the trade-off for being secure would have been unacceptable performance and/or database bloat.
Not really. I can recall just one time where someone found an exploit to do so, probably 3+ years ago, which was handled quickly.
With Diablo III being a one-time purchase, item duping would devalue items on the player side and may or may not result in increased commission revenue for Blizzard (depending on how many players will actually purchase the item on the auction house).