They should have made a request to not only demand such bills to cease, but to demand bills that reverse parts of current laws controlling the Internet.
Otherwise politicians will reduce some of the bill, but the bill will still implement more and more Internet controls [0].
The problem with this solution is that the government has guns and prisons and they will use these to compel individuals to do as they say. If every ISP refused to comply, the feds would make a big show of raiding some significant-but-not-huge regional ISPs and scare the rest into compliance.
Of course, some of this country's largest ISPs probably like SOPA and similar legislation because they see it as strengthening their larger source of revenue: cable television.
Otherwise politicians will reduce some of the bill, but the bill will still implement more and more Internet controls [0].
[0] https://en.wikipedia.org/wiki/Door-in-the-face_technique