I think this is a bit of a straw man. Hasn't the FCC already made it clear that blocking entire protocols is illegal?
And, I don't know that I can recall many content folks arguing that BitTorrent as a whole should be blocked. My memory is that they complain that BitTorrent is heavily used for piracy (which is factually accurate), and propose ways to stop the piracy. For example SOPA did not target BitTorrent as a protocol or technology, but instead tried to shut down foreign websites that provide links to pirated content.
And, I don't know that I can recall many content folks arguing that BitTorrent as a whole should be blocked. My memory is that they complain that BitTorrent is heavily used for piracy (which is factually accurate), and propose ways to stop the piracy. For example SOPA did not target BitTorrent as a protocol or technology, but instead tried to shut down foreign websites that provide links to pirated content.