It’s a very simple rule that shouldn’t be hard to follow: Never amplify other people’s outrage, not even indirectly, unless you’ve personally checked the source. Even then, better check twice. I keep falling into this trap, and get mad at myself for doing so.

I have sometimes thought that the decline in quality of discourse coincided with introduction of the "retweet" and "like" features. IMO we'd be better off without them. Even the tiny overhead of mousing over for copy-and-paste would reduce the gain on noise.