What's the worst thing you've ever done in a video game?

[ameratsu]

In Ultima Online, I turned 10,000 gold into 7,000,000 in a few weeks with a duping bug, thereby contributing to the insane inflation that happened in that game when I pumped the duped money back into the economy. As a side note for those who've never played ultima online: It took a long time to get one million gold legitimately let alone 7 million.

I would also kill miners' pack animals in town and steal their ignots when they tried to carry it themselves.