I do recall one case of a US pilot at Palm Springs who got banned for drink flying....So what did he do, took his plane for a last spin....literally...into the ground and killed himself, accidentally by all accounts while FUI. And there was the other one at Hemet who decided to go for a quick flight after the pub...and ended up in a ditch on landing, he lived though. So it shows it is very difficult to regulate against morons and pillocks.
I certainly won't fly with anyone or in anything (any more), and I won't fly with people who don't take flying seriously or show off.