On more than one occasion when dropping my children off at school/preschool they have seen friends/people they know and said hello and been completely ignored by the children and the parents. Now I know some children are shy (myself and my children are incredibly shy) however I taught them to be polite if some is talking to them. On more than one occasion my daughter has gone to say hello to a friend who has not responded but the parents have either pretended my child isn’t standing in front of them ie no eye contact , completely looking through them, or not politely said to the child someone’s saying hello to you don’t want to say hello back , or something along those lines or even said hello to my child . Drives me mad isn’t this just basic manners. I’m not expecting people to force their children to talk when they don’t want to but a small hi or even a smile cost nothing!