It's not without good reason that people hate feeling crowded in Walmart - or anywhere else for that matter. Claustrophobia isn't just a fear of being surrounded by people; it's a fear of what kind of people you're surrounded by. Anyone who's ever spent any time squashed up in close proximity to multiple members of the general public can attest to the fact that personal hygiene standards often leave a lot to be desired. Then you have people like this guy, who just make things far worse.
This is pretty much the last person we'd want to be stuck in a queue behind at the checkout, entering a lift, or just about anywhere else. What's he seriously hoping to achieve with this t-shirt? Has anybody ever burst into hysterical fits of laughter after reading it, and congratulated him on his epic sense of humor? Of course they haven't. If he did it to us, we'd class it as a premeditated fart, and call the police.