I just want to mention (1) I view this as a bad thing and think we ought to try to move away from it; (2) I whitelist javascript so at least not all of the above is happening to me, and I think we ought to move toward all users having the tools and competence to do the same.

I just use https://www.eff.org/privacybadger

Probably not 100%, but it's better than nothing. And having people install a plugin is easy enough.