This really doesn't grind my gears but I saw someone who it does really bad.
If you go to planet fitness they have a lunk alarm. Video shows it, basically if you drop weights a alarm goes off.
Planet Fitness: Initiate Lunk Alarm - YouTube
Well at my PF they have universal machines as well as free weights. There are two universal chest presses. For some reason on both machines if you put it on 80 pounds the 90 pound plate sticks then falls off as you lift. This makes a loud crashing noise and the alarm goes off. I just try not to use 80 pounds and all is good.
Well today some dude who is always on those presses made it happen and the alarm went off. He just went ballistic screaming about how they need to fix it. It was too funny. A few people clapped because it is true they need to fix it.