Sometimes you end up in a GitHub organization with many repos you don't need to watch (but can't leave the organization). To mass unsub from all repos: 1) visit https://github.com/watching, 2) open the inspector console (command+alt+j) and paste in the code below, 3) change 'name_of_org" to the name of the organization you want to unsubscribe from, 4) hit enter.