I would like to think that the police, of all people, are following this controversy closely and that their social media managers know what they're tweeting out into the world and how it will be perceived. But maybe they don't. Maybe you don't. Maybe your uncle doesn't. (Though, c'mon, you've heard him rant after a few glasses of red at Thanksgiving.) Maybe you refuse to believe that when you say, tweet or even sing "All Lives Matter" what people hear is that you're racist. But if you don't think that it devalues the lives of black people consider this.