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Sims 2 Hacks Spread Like Viruses
jowens writes "SecurityFocus reports that players sharing house designs through Electronic Arts' Sims 2 Exchange are finding their game behaving oddly: espresso machines mysteriously satisfy all the Sims needs, Sims are suddenly comfortable with open relationships, and the social worker no longer cares how they treat their children. It turns out hacks were spreading invisibly with Sims 2 lots, infecting thousands of downloadable homes, and catching Electronic Arts by surprise. The hackers, who never intended their hacks to be viruses, have even written their own AV scanner to find and control the outbreak."
Essentially, everything behaves like viruses in the game, but people didn't realize this in advance. It makes sense that when you import a house, the things in it come along, but people didn't realize that a number of game mechanics were treated as things in houses. People also didn't realize that, if you modified "the espresso machine", the change would apply not just to one item, but to all items like that one, so importing the house with the weird espresso machine imports and applies the weirdness to your espresso machines, which you then pass on when you export your house.