Of course people judge me. And I judge people. It is a survival mechanism that is instinctive in humans -- well in all creatures. Past experiences drives future behavior. If in the past I had a bad experience with a person who looked a certain way, or acted a certain way, etc., my instinct is going to be to expect the same experience.

If I see a person coming toward me with a gun I am going to judge him or her and not wait to find out what kind of person they are on the inside.

I can however, change people's impression of those who look/ act like me....as others have suggested as well!