Drowned Outrage

A phenomenon on social media and forums where many people complain about an outrage but never see any evidence for said outrage. This usually happens when a small minority opinion gets blown up with hyperbole and overshadowed by the counter-outrage.
Sometimes, the counter-outrage will also be overshadowed by people realizing they can't find the original outrage.

Where are the people they're complaining about? This has to be some drowned outrage.