This doesn't surprise me at all. The last time I was actually in a Wal Mart I had an employee yell right at me when I asked to get by their carts in the way. I complained to their corporate, expecting at least a call back. I got nothing. No phone call, no emails, nothing. They really do not care apparently. So I refuse to spend any $ there ever again.
Sam Walton once said "There is only one boss. The customer. And he can fire everybody in the company from the chairman on down, simply by spending his money somewhere else"
But does anyone really think that they still follow this advice? Wal Mart has a well deserved terrible reputation.