Not me, but a dear friend with a great line in put-downs,
once let out an audible sigh of disgust (with suitable facial expression) which was noticed by the pond-scum mother who was content to let her kids raise merry hell in the supermarket.

'You got a problem, pal?' she queried.

'Yes I do, actually: if you can't control your grandchildren, you shouldn't take them out in public.'

This led to a very loud, expletive-strewn explanation about her relationship to the children in question. David simply sauntered away. Job done.
( ThisCaledonianClown has left it far too late, Sat 6 Mar 2010, 22:29, Reply)