Certain ages and conditions of children make that irrelevant. Try getting a three year old to stop anything--you'll trade being a punching bag for deafness from

Certain ages and conditions of children make that irrelevant. Try getting a three year old to stop anything--you'll trade being a punching bag for deafness from shrieks and whining--or an autistic child to even be aware that he is doing it. It's rare that one knows more about how to handle children than their caregivers, and "reminders" from strangers are often wrong, besides being insulting.