This is a big part of things, we read about the (now more publicized) accounts of bad things happening, so we get nervous. But I do like to help people in front of my son, so he knows it can be a good thing.
I had a similar event a few months ago. Went in on a chilly morning for some routine blood work, and coming out saw an older woman standing there. I almost went by her, but stopped and asked if she was waiting for a ride. She seemed a little nervous but answered she was waiting for a bus but thinks she missed the most recent one. I offered her a ride to her home (about 90% on the way I was going anyway as it turned out). Still nervous, so I explained I would understand since I was a stranger, and offered to show her my license and have her call someone on my cell phone to tell who I am. She agreed (no license or call necessary) and we actually had a nice chat on the way. I heard a tiny bit of her life in Europe and when she moved to the USA.
In any case, I echo the great words above, and thank you Steve...for being you