If it happened to me, I'd probably decide to never go into Wal-Mart again. But I already don't go there because that place gets me very anxious. Too big, too many people, and I can't stand feeling like I'm always in somebody's way, and I always feel like that in there. And I have problems with the way they do things too. They don't treat their employees well at all, and the greeters least of all. And they are doing all they can to promote global poverty. Ok, but those are my opinions.

I think it could help to take a step back and try to understand why this person is doing what she does. Greeters at Wal-Mart probably don't get good training in how to really effectively deal with customers. Mostly they are supposed to smile and hand you a cart, and maybe hand out stickers. It's a misunderstanding of the concept that people are more likely to buy something if a store employee approaches and talks to them. But it doesn't work the way Wal-Mart tries to do it, where it doesn't mean anything and is just generally irritating a lot of the time. That job has been selected in surveys as the worst possible job you can get. It's thankless, and they pay diddly squat, and don't give them real authority to actually do much of anything. Ok, so I have some empathy for Wal-Mart greeters. If they are there, then they probably had some trouble getting any other job. They are bound to following stupid instructions, and not encouraged to think for themselves. So they pretty much have to stick those stickers on things and not question it. I bet they have long days on their feet, and I bet that lots of people are irritated with them.

Anyway, you can probably add to this. My suggestion is to try to take a step back and see things from their perspective. The more empathy you can develop for them, the smaller your anger will get. And if you still have a problem with the person, see if talking to the manager helps to resolve it. The policies at some stores can be idiotic. It's not the employees' fault.