Am I the only one who thinks this is a completely unreasonable response? You purchased the game, whether or not you should be allowed to download another (slightly modified) copy is a legal gray area - but one I would morally support.

Downloading other products from the same company, just because they ticked you off? You've just escalated the situation from what is likely an unfortunately operational issue (no malice) to some form of revenge.

If you want relief from the harm done to you (which, I would argue getting the pirated copy of AC3 was), allow a court to determine the reward. In this situation, it's likely overkill.