This is a nice step in the right direction. A lot of the bad treatment PC gamers have been getting lately does relate to the fact that so many people play pirated versions of games on computers (much more than consoles anyways). I don't condemn pirating, but the more it happens, the less publishers will look on us (pc gamers) favorably, and that just blows.
I wish I could sign this petition, but even before this "leak" Crytek seems to have stopped caring as much about its pc fanbase. Crysis 2 is not on my top priority list. I might buy it in 6 months if it goes on sale on Steam or something.