Earlier quoted context omitted.
I know it may seem that way on the surface, but the proponents of this bill are larger than you think. The MPAA represents companies with a combined market cap of $250 billion dollars. That's small enough for us to beat, but Pfizer ($150bn market cap) and Microsoft ($220bn market cap) are also major proponents. All together, there's a LOT of muscle behind this act, lobbyists alone aren't going to cut it.
Not to sound naive here- but why does Microsoft support this if all the others don't?
Its members are made up of mainly non-web technology companies that sell expensive products and are worried about piracy or counterfeiting of those products: Oracle, Microsoft, Adobe, Intuit, Symantec, etc. Conversely, they don't run user-generated-content sites like YouTube or Facebook, so aren't worried about the problems with weakening safe harbors.