Tell them that social justice warriors are what happens when the class snitch grows up.
Today one of mine was making jokes about the Iowa Democratic Caucus. "They still don't know who won!" he said, and: "Nobody can stop Trump!" Apparently he's been talking about it with his classmates on the playground and in the lunchroom. They seem to regard their "liberal/progressive/left-wing" teachers as lunatics.
There's hope for the world.