I've found that little details like this can kick people out of destructive habits. Similar to how, if you make a careless parachutist jump without a backup the

I've found that little details like this can kick people out of destructive habits. Similar to how, if you make a careless parachutist jump without a backup they will check their main chute MUCH more closely, showing people that one less net is under them tends to be a bit of a wakeup call. When you do something stupid and escape unharmed it tends to make you ignore the risk. Speeding, tailgating, smoking, drinking, fighting, etc... As human beings we really suck at assessing risk. However there is always a small window when someone comes back to reality for a moment. When a friend gets lung cancer and can't get a heart, when a car loses a 2x4 and you barely escape being impaled on a timber, when you hit a patch of water and your car nearly loses control because you were going too fast, or when you watch a man die instantly after getting hit in the face for the 100th time during a friendly brawl.