According to this Gameranx report some hackers in Russia are already playing Far Cry 3: Blood Dragon, despite the fact that it isn't quite out yet. Apparently a group of Russian hackers have discovered an exploit in Ubisoft's uPlay digital distribution service that allows them to download the game without paying for it. The software tricks uPlay into thinking the user owns games that they have not actually purchased and allows them to get direct download links to versions that do not need to be online in order to play.
While this exploit seems to be active as of this writing, it is probably not a good idea to try it yourself because Ubisoft will ban your account. Ubisoft has not publically commented on this exploit or acknowledged its existence.
We'll have more on this story as it develops.