That’s called cutting off your nose to spite your face.
I would clarify though that I'm not talking about children dating. Back when I was 15 or 16, when the girl's dad said 11 sharp, I usually brought her back in right around 11 or so. Even as the punk I was then, I understood that it was perfectly reasonable for a dad to keep track of his 15 year old daughter. If I had encountered the gun-cleaning act, though, I probably would have found some way to thumb my nose at the guy.