This guy probably makes a good buck at the local mall every year, and if he's in Atlanta it's probably a REALLY good buck. You can't grow a beard like that overnight, so it's no wonder he plays the part year round. He looks like Santa in plain clothes in the video, so he probably gets the attention regardless of what he's wearing. I blame the weird photos on the photographer. Santa has to be laying on the floor playing with planes? Really?
As a parent, I would steer my kids clear of the guy. Not because I think he's a creep (btw - I presume every stranger is a creep and keep my guard up for my kids), but because I would presume that he's a guy that plays Santa every Christmas, and would rather not be bothered by my kids when he's on vacation in July. As for Disney, they have no choice but to ask him to not make a scene. Nothing wrong with what they did either. If he's intentionally making a scene, like walking the tables in a restaurant or ringing a bell on Main Street, then they have every right to ask him to leave.
