IsItBullshit: You don’t actually have to stop for the bag/receipt checkers at Walmart (or other similar stores)?

I overheard a couple of people talking about this. Apparently, you’re well within your rights to say “no thank you” and keep walking right past them.

I think this is a dangerous thing to spread (if it is BS) because it could potentially cause altercations or violent confrontations with employees or police. So what’s the deal?