I get where you're coming from, but the person who called it in named themselves SWauTistic and makes a hobby of this behavior.
Yeah, but I don't think that's reasonable to do. If you live in the U.S. you know this is a problem, choosing to still do it is more damning.
I'm not arguing that they should. I'm saying that they are, and having knowledge that they are makes the one calling in the threat seriously in the wrong. I can't stress enough, the caller's twitter handle is SWauTistic. They know full well what they're doing.