I had someone follow me from the gun range once. I am sure of it, I made a sudden turn into a shopping center and he still followed me there. I went into a store and he waited outside for a while. I went outside and just stood there staring at him, and he just took off. I did not have my permit then.
I remember he was just hanging around the gun store looking behind the glass at people shooting, never look at displays or used the range. I believe he just follows people to wait for a chance to steal a gun from a car or your house later. I don't believe it had anything to do with gangs, just a thief. I grew up in an environment where I learned very early on to be aware of my surroundings. This kind of thing does happen.