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

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.