Stereotyping is everywhere

So the other day I was in a store with my mom at the mall. I picked up something and looked at it and I noticed that a man was keeping a very close watch on me. I began to think that I was only being watched because I was a teenager or how I dressed. This made me think of a time that I was in a supermarket and I picked up a magazine. I was about twelve years old and I remember a security guard telling me to not walk off with the magazine. I was shocked when I heard this because there was an older lady that had a magazine and he said nothing at all to her. At that time I thought about what I was doing. Was I acting suspicious? Was I putting my hands in my pockets? I had no idea. So what I did was put down the magazine, ignored her and walked off. I thought this was the right thing to do because I was not doing anything wrong and being embarrassed like that was not worth reading some dumb magazine. I told my mom about this and she began to tell me how they watch for kids like me because we are known to steal more than grown ups. Now, I realize today that people can be very prejudice about many things. They might not mean to be, and are just doing there job, but they should do so in a much better way. After watching the movie with the kids and eye color, This made me think of this incident for some reason. I thought to myself how people are very prejudice all the time, even excluding skin color.