Back when I was at undergrad, a friend of mine and I left a test review session and went back to our homes. I walked and my friend drove to the session. One woman whom we never met and wasn't in our classes asked my friend for a ride back to her place.
My friend obliged, but told her she was crazy since he was a total stranger. The next one might not have been a nice guy .
I am constantly teaching (er, preaching) about safety to my girls. Don’t think someone is “nice” because they dress nicely, or look nice. Don’t trust a stranger period. When walking in a parking lot... look at the cars. Are they occupied? If so, walk away from it. Walk quickly. In a city.. don’t walk near the wall. Walk in the center. Look a head of you, behind you and to your side. It is the world we live in and no matter how sad.. it is what it is.