In my professional opinion it nothing more than a band of traveling "gypsy's". I've seen this before, they appear to be down on their luck, poorly dressed, bad haircuts (or no hair) wandering aimlessly around a large store mumbling to themselves. Don't let the one with the stick fool you, he is probably the "king gypsy" of this clan, and if security came he would run like a deer! BTW, they always have the family with them, its just a cover
Consider this a public service announcement