I knew a guy who sang in Short's. He sang sharp in Short's. And he couldn't remember most of the words to the most common songs. Went something like

"He was dirty and hairy and hummmmmmmmmmdiddyhum
But he had his diddleydo by hummmmmmmms de dees
All hail the mmmmmmmmmmm King of England!"

Well, some of of the customers in Short's were still fighting the American Revolution and assumed that he was singing a song in praise of George the Third. And, as I said, he sang it sharp.

So they stomped him and hit him and tossed him out into the alley and from there I assume that he limped home. He was never again seen in Short's, singing sharp or any other way.

The glockenspiel upon which he accompanied himself was hung over the bar as a warning to others.

I don't know if there were any long term effects, other than the glockenspiel getting dusty.