Going to the playground with your child is meant to be enjoyable, but sometimes other parents exhibit behaviours that set off warning bells. For example, you might notice a parent being cold to one child while favouring another, dismissing a child who politely wants to play, or addressing your child instead of speaking to you during a confrontation. These “red flags” can reveal a lot about the parent’s overall behaviour.
https://www.yahoo.com/lifestyle/parents-share-us-parenting-style-201919598.html