The one thing I dont understand is why are gaming companies showing public support of SOPA. They should know that the trend-setters in gaming industry are geeks and nerds who are all very aware of how internet works and how SOPA may potentially drain the life out of it. Also, a lot of gamers are tech-savvy enough that they will start pirating their games just to spite them.
Safety in numbers. Sony and Nintendo are both on this. They're counting on nerds being reflexively unwilling to switch to Microsoft on a matter of principle, even though Microsoft seems to be the least evil of the three.