You are missing the point. Yes it's illegal to operate a child porn website. But we don't need ISP's inspecting all packets for signs of child porn to put a stop to that. That is very a la NSA inspection that most Americans object to -- only instead of being under the guise of "anti-terrorism" it would be under "save our children", a common theme with most politicians.

Furthermore, just because a website's activities are illegal does not mean I intend to break the law simply by visiting them. If that were the case, Brian Krebs would be in prison by now.

What we don't need is mandated filters by the government like they have over across the pond. Opt-out but defaulted to opted-in - and impossible filters that catch up a lot of legitimate websites and content which then have to file some sort of petition to be unblocked, meanwhile costing them all traffic and a lot of business (look it up, news websites have been taken down numerous times by the UK "porn filter" because they ran a story relating to porn and the entire site was blocked).