When I was 19 I taught Water Safety and First Aid classes to Job Core members (on campus). One evening I was threatened at my car by an angry Job Core student. He was a 30 year old black man. He scared the daylights out of me and bruised my arm black and purple where he grabbed me to pull me out of the car and pin me against it. All he did was scream in my face until my co-worker heard the yelling, ran up and scared him off.
My car door now has the auto lock feature but you better believe I learned to lock it when I got in. I even double and triple check it when strangers get close. And if I offend anyone that sees me do it... too damn bad. Screw you.