I recently helped a mate of mine develop the imagery for his Google Chrome extension called "Happy Comments" which is sort of a lame name, but it gets to the point.
It essentially mutes the milieu of shit you'd normally find on sites like Youtube and leaves you with only the stuff that's highly rated. No longer will you see any flame wars or stink name calling. Hopefully it'll help create a more positive web. Check it out: https://chrome.google.com/webstore/detail/mldccdelgplcedlcdgjjpmmbfajamndh