The population is too far gone into looney land to even blink at somebody threatening to shoot anybody else, or any other physical assault, or any kind of violence. Jaded, numb, they see everything as a boring joke. No morality, no conscience, no cognition. Don't think anybody's sense of outrage or justice is going to be triggered by a phrase about shooting.
The danger to the Average Joe's normal daily life is about the only thing to get their sincere attention.