They are trying to get their foot in to establish that the government has the final say about what is and what is not permissible on the Internet. And this bill is not about what it says, it is a trial balloon to gauge public response.
How do you, Jeff, like the idea that if the bill passes, some anonymous govt official can shut down your Web site and seize your domain, on someone's say-so, even if it means that it will deprive you of your livelihood?
The bill provides for no jury of your peers, no right to face your accuser, no due process. The switch can be turned off because you were accused (as opposed to convicted, in the court of law) of violating someone's copyright. All what is needed is to quote SOPA in a notification.