All these people suggesting to call authorities, get violent or treat the threat as legit seriously makes me question how much experience they have with nasty/vicious people. :/

I can understand being freaked if you're not used to vicious people, it can come up as a red alarm. But anyone with decent exposure to such nasty people learn quickly it's far more bark than anything else, and that freaking out over it only serves to make yourself more scared and worked up over it.