Judgement and prejudice happen everywhere, and we all can relate to this somehow. Either we may have judged someone or we may have been on the receiving end of that judgement!
For me, I have often been judged by my jolly good behaviours as to brand me as immature, when actually they are familiar with my "mature" works. They directly assume that I don't have an in-depth knowledge in anything by my behaviour and often they say after getting to know me for real.

What makes us think so less of someone just by how they behave? Why do we not take an effort to know who they are and just walk away with our assumptions?