littering.
I was going out with this guy I really liked. Probably 3rd or 4th date. We decided to take a drive, and went to a local grist mill. Walked around, had a nice time. Took the scenic route home on this road that ran along a pristine Tennessee Creek. He was drinking a Gatorade or something, and when he finished it, rolled down the window and chucked the bottle out into the creek.
I stopped the car, made him go pick it up (or I wasn’t going to drive him the 20+ miles home), and never called him again. Fuck. That. Behavior.