Interestingly, there was a time not too long ago where there was no such thing as returning your carts. No place to put them, and store employees fetched them. I always return my cart so it doesn’t blow away and smash into someone’s car - but I bet a lot of boomers think nothing of leaving it wherever - because that’s kind of what you did.
I'm sorry but there's No way even boomers get a pass. It's been expected to return your cart to the stall for longer at least 30 years. In some places you even had to put $1 into the cart to use it and got it back when you returned it ($1 was also a lot more 25 years ago).
There's really no excuse for not returning the cart today and anyone who fails at this simple task of self-governance is no better than animal.
But who expects you to return it? The company that owns the store? What if I don't return it in protest of their corporate greed? Who are they to make me do manual labor for free after I just paid them‽ Back in my day they would load your car for you. Lazy company CEOs are too busy counting money to keep their parking lots in order! lol