That is awesome! I have been using News Feed Erradicator for a while but that is next level! Too bad I am using Firefox ;)
Also, recently I realized that when I in nervous procrastination mode I also check GitHub too much to look at the stream of updates and "someone starred ..." stuff, I have looked for disabling the stream but could not find it... I guess I could try play with the Stylish plugin to make it disappear or sth.
Admittedly, sometimes I wish I could remove all "points" and "numbers" from the web, even on HackerNews. There is this quick brain sugar rush when you see these numbers rise, but just a minute later I feel empty, sad, and dirty for having this narcissistic automatic response.
This is one of the reasons (the other ones go around privacy and tracking) that I don't do Google Analytics nor any kind of access.log aggregation/analysis on my websites. Maybe this is a stupid rationalization, but I'd like to think that we value stats too much and that they distract us from doing better qualitative design and analysis...