The big problem with the lawmakers dealing with SOPA is they are well aware they are ignorant of technical items and are not willing to bring in experts to discuss issues.
The last big hearing before the committee had a bunch of pro-SOPA companies and Google. Google tried quite decently to warn about the damages of the bill, but when they are being described as a pirate site by the lawmakers dealing with the bill, you know things are well stacked in favor of getting the bill passed.
There are a few sane folks on the committee and they are doing their best to stall the bill and keep it from ever being voted in, but even that may fail. Hopefully Google, Facebook, Twitter, and PayPal will go through with their coordinated blackout in protest if the bill exits the committee.