Instead, how about we make a combination browser extension/hosted service which renders the page server-side, extracts the content, and serves it clean. Users

Instead, how about we make a combination browser extension/hosted service which renders the page server-side, extracts the content, and serves it clean. Users can leave bounties on sites and once the bounties pile up high enough somebody will come along, sanitize it for everybody, and collect the bounty. Sorry about your ad revenue, next time don't piss off the masses. The bounties will be public, so site maintainers can see if they're on the list and address the issues. If the community decides that the redesign addresses the problem, the bounty goes back to its issuers.