Ah, internet comments... They never cease to amaze me, but rarely in a positive way. From comments about Naziism, blatant spam, or people happy that something failed (and these examples are just from one Taylor Swift video I've taken a look at for this post). Wouldn't it be nice to not have to see these comments? Thankfully, two people have done the work to make it simple for you!
It does what you'd expect, completely obliterating the comments section from websites that you visit.
Left: Before enabling Shut Up plugin. Right: After enabling Shut Up plugin.
But maybe sometimes you might want to view the comments section. Enter Shut Up: the plugin.
Ricky Romero has made plugins for Google Chrome and Safari, and an iOS app that make's use of iOS 9's content blockers. The desktop plugins allow you to toggle comments with a toolbar button, while the iOS app allows you to whitelist sites in the app's settings2.
I've been using the plugin and apps for quite a while now, and I can't say that I miss the comments. Occasionally I'll toggle it just to see, but I'm happy mostly living away from all the vitriol.