It would only work if a strict list is the default in browsers that developers are not willing not to support. The point is not to hack around user-hostile patterns. That frequently means entering an arms race you cannot win. Even in the best case, you're doing that site developers' job. Badly: You have to remove the bad stuff while avoiding overblocking. That's a lot harder than not adding it to start with.

I'm proposing to take away tools from developers that abuse them no matter how much that breaks. If you mine bitcoins or annoy the user using pop-ups we shouldn't spend time finding out what scripts are good and which are bad but just disable all of them, till you remove the user-hostile stuff. We just broke your SPA? That's your problem. Better start working then.