My brother called me today. He doesn't normally so I was concerned something was wrong with my SIL (she is having health issues) but he told me a little story that should go here.
BTW: I already told him if he's afraid of the consequences of saying something outright, just report him anonymously to the DMV.
He said his wife was in the back seat riding with her mom and dad and they stopped for gas. Her mom was saying something outside and his wife wasn't really paying attention until she knocked on the window. Her mom didn't know how to pump gas and could not figure out why the nozzle would not fit. She was trying to put diesel in a gas tank. He said he asked his wife why her dad wasn't pumping the gas and she said 'he's forgotten how'. The dude is 85 years old and HE WAS FUCKING DRIVING.
I am still freaking out thinking about it. I'm glad I live on the other side of the USA from someone that fucking stupid.