Has anyone robbed you for your camera?

I was just thinking, since two of my hobby's are biking and photography, if i were to be riding a trail and i stopped to photograph a lake or some flowers, and someone comes up to me and rob my camera (7D w/ macro lens or 200mm). I dont have that setup yet, but some people know a good camera when they see one, so im curious, has anyone been robbed for there camera?