So I've spent my entire adult life working for a major supermarket chain. I became a Front End Manager, an Assistant Store Manager, and became a Store Manager for 16 years. I stepped down to a Grocery Department Manager 4 years ago to accommodate some home issues. Not that my opinion matters more than anyone elses, but I just thought I'd mention that. I have taken dozens of carriage damage claims over the years. What funny is that like 75% of them the customer says, "I just got the car this week."

Anyway what I would also tell you about my self is that I am not a rude person by any stretch. I am more than friendly and polite. I may tailgate you if you are driving too slow in the passing lane, but am more than happy to let people in if they are trying to come out of a tough side street.
I am also a reluctant tipper. Because someone takes my order and retrieves my food, I now have to inflate my bill by 10-20%? Fuck that.
Likewise, I also don't feel like I should have to return my carriage when I go grocery shopping. I can't remember when corrals started popping up, but why would I do the store's work? What's next? Bag my own groceries? They already have me sucked in on that. First hours to be cut? Bagging Hours. Which coincidentally are the same people that collect carriages. Next thing you know, I'll be scanning my own order. Oh that's right. Self Checkout, where maybe there might be a monitor to help on up to 6 registers. Follow me?
And this has nothing to do with my work experience. This is common sense. I am not a "stick it to the man" kind of guy, but I also don't like places where I spend my money to expect me to do what I am paying them to do. Does that make sense?
These corrals weren't erected for the greater good of mankind. They were erected to (sorry to pull a Stadler) 1) save labor costs, and 2) save on damage claims. That's it. But the stores have to be psyched because what has happened over time is that it is now accepted practice to return these carts. God forbid you don't and you'd be considered "rude" or "inconsiderate". Yeah, times change and accepted public norms change with it, but the last thing I need is some "do gooder" telling me that it is my duty to return my cart.