You can Science on Anything, really. Here’s a discussion of “What is the moral reasoning of people not returning their shopping carts?”:
I always return my shopping cart because I don’t want to think of myself as lazy or inconsiderate.
I don’t return my carts on principle. Although I also don’t block parking spaces – i put them on islands and curbs. My assumption is that if the cart wrangler could get a better job, he would. So I’m doing my part to keep him gainfully employed.
The question generated so many comments that the original site had to turn off comments.