They’re even perfectly arranged on the shelf.

No.....I've seen people like this. They take stuff out of their cart, put on the closest shelf, and walk off.

When I was a kid, I'd pick it up, throw it at them, and yell "YOU FORGOT THIS!!!"

I'd always try to aim for the torso. I wanted to hit their head, but I have bad aim. One time I did hit them in the head. Can of green beans. They came over to yell at me, and them my mom got in her face about yelling at her son. Meanwhile I'm behind my moms back making faces.

Then my mom asked "Were you actually throwing things at her?" I said yes. She asked why. I said because she left her mess for someone else to clean. She then told me I had the right idea, but I can't throw stuff at people. I said "Actually I can. Hit her right in the back of the head!"

She just shook her head and said "Not what I meant...."