The TV studios are all behind SOPA as well, so canceling cable in general isn't a bad idea. As a side benefit you no longer have to watch TV. :)
Maybe that's a "young person thing" though. My parents watch a decent amount of TV, the only channel that appeals to me out of the hundreds that they get[1] is Comedy Central... for one hour a day. After going to college and being without TV, I really have no stomach for commercial breaks anymore.
[1] not actually sure about this, Comedy Central is 600-something, I guess they might not all be used though. Still probably hundreds.