I've been using a simple Javascript whitelist/blocker for the last 4 years or so (a dead-simple Safari content blocker for iOS and Mac I wrote myself; syncs over iCloud just to give me something to do) and I honestly don't know how anyone can stand the wide-open web without something similar.
Using the web with free Javascript privileges is an utterly appalling experience. I can't stand it for more than 5 seconds.