We should really listen to our youth, because sometimes adults learn helpful life lessons from children. For example, an entitled adult who thinks it's okay to treat kids with zero kindness because they're older and “more mature” has a very harsh lesson to learn. You can't be a grown person and act like it's okay to treat everyone around you like you're better than them. Come on, we live in a society, man. Grow up. This story comes from a '90s kid. This millennial was doing what young kids did…