that is exactly why I very, very seldom will help someone stop on a highway, I feel bad about it but now days it may not be safe to do it. yes sad, I used to give rides to hitch hikers as well but no more. I've changed tires, gotten gas, pushed, and jumped but no more, unless it is in a very, very, public place with people around. Nearly everyone carries a cell phone now days, and yes they can call someone else.