The little boy in the shop yesterday who kept pretending to round house kick everything, talking like he was outside, touching EVERYTHING in the store and being a general nuisance. He also interrupted me as I was talking to another adult. When I gave him that look, he shut up. When is mom acted offended, I gave her that look too.
It is NOT my fault that your child cannot behave himself, that is totally your screw up. Own it, claim it and DO BETTER!