I wouldn't waste your breath Capt. No-one will listen cos they don't want to believe it!
It's like the kid who wants to put his hand in the pretty fire. No matter how many times you tell him it will burn him he doesn't listen until he puts his hand in it and screams "that hurts!"
So let them borrow borrow borrow and add to the ranks of the desperate impoverished wasted lives that make up aviation!