Probably about 45 years ago when I was very young I took a book out of the library and forgot all about it. When I realized what had happened some time later I was worried I'd get in trouble and that the fine would be way too much for me so I stuffed it into the back of my bookcase and hoped for the best.
I like these stories about how people are amused and forgiving about long overdue books but I live in deep-blue fascist New Jersey. I'd probably be jailed for 10 years if it ever came out.