And it's not just anger for anger's sake. There's a desired end-result to our mystery person's challenge: So the U.S. can grab gun-rights supporters by their trigger fingers and "stop their disgusting campaign dead in its tracks."
Who might be demanding Americans fall into a rage over lack of gun-control?
If you're guessing CNN's Piers Morgan, you're absolutely right.
Perhaps with his future employment potentially on the line Morgan was feeling a bit prickly on Saturday when he tweeted the following:
What are your thoughts concerning Morgan's challenge to America?