I don't know how you would do it but (a) if you could do it seamlessly and without user interaction, and (b) you could get it publicly known as an option that p

I don't know how you would do it but (a) if you could do it seamlessly and without user interaction, and (b) you could get it publicly known as an option that people could "Ask your ISP if they support this feature" type of thing, you'd have something. I can see this as an ISP-level play: 1) You, Mr. Big Data, don't have to serve as much data through your pipe b/c you can strip it out prior to sending the page 2) You also give your users the ability to come to your website more often. They'll be updating/adding their filters. They won't want to switch ISPs b/c they are locked in to using your filtering system. It's a big data play in that case which means VC money and big deals with big companies. It would work if you could do it fast enough though.