I'm with you @Broken at 20. When I had a car and lived in the mid-west, I can think of 2 occassions in which walked me to my car after a party. I was later accused of going with him to get my brains ****ed out.I already said I'm not looking to change society, I merely live in it.
On another occasion, I was at a private party and one of the guests who was foreign told me he was going to get home by metro. The had already closed by then and I offered him a ride home. I saw the host a week somewhere and he was making vague statements that added up to "yeah, did you have a good time with him, wink wink." I gave the perplexed look thinking that I had saved him possible from an unwanted over night guest.
But there you go, I've learned to accept that managing the optics because people will hump to conclusions.