The problem with the NOOP solution is that most of the small sites (the ones with nobody doing ongoing maintenance) are hosted on managed shared servers -- avoiding an upgrade isn't an option. The site owners will just wake up one day to an inbox full of UR WEB IS BROKE emails if they're lucky, and may even understand enough of what the ISPs first-level help desk drone tells them to get it fixed. (I imagine, though, that accusations of extortion would be more likely, since the quick fix would be a VPS with a non-refundable one-time setup fee.)