Dick Knights Mumm
Take me Home Falmer Road
Top advice that, as he was probably thinking of doing just that until you pointed out the error of such a ploy.
I hope he follows it.
People with a grudge have long memories - and so best not to feed it was the point I was making. He may feel better having put his hands to his ears - but it will only encourage the boo-ers when the next opportunity surely arises.