5. No Discipline

This is kind of the same thing as ignoring a child. If you don’t acknowledge when your child is doing something wrong, they will never learn the appropriate behavior for society. However discipline does not mean abuse. Parents should pull a child aside and explain what their child is doing wrong, and what the appropriate behavior is. This is much more subtle, and unless you're close to the parents who are doing this, there's no tactful or helpful way to mention this.

Favoritism
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