Glad the OP stood up to confrontation but as usual tough-guy approach on this thread is annoying.
You do realize that if he is homeless in ATL then there is a 25% chance he is a veteran?.
So which is it? Hate the homeless or love the veterans?
Do you realize that if a guy is mumbling to himself and listening for a reply from the hood of a vehicle that there is about a 100% chance he ain't right?
Whether caused by drugs or illness, psychosis is very dangerous. Psychotic/delusional people murder others every single day. And people doing such things are clearly seeing/hearing things which aren't real. Never underestimate how dangerous people like that can be.
Veteran status matters not one single little bitty whit in this instance.