If it's somewhere that has limited parking like the LA videos then yeah, the carts blocking parking spots would probably drive me nuts too. However some of these videos have huge parking lots where someone leaving a cart is certainly not polite, but not really a big deal either. If I was a stoned teenager working at a grocery store I would much rather trade hours for dollars walking to the far reaches of the parking lot to fetch carts instead of mopping floors or whatever miserable crap people do for minimum wage.
Either way, weird hill to die on.
Either way, weird hill to die on.