I remember one time, several years ago, my friend and I came back to her car to discover that she had a flat tire. Neither of us knew how to change it, so we sat there for around ten minutes trying to figure it out until my friend let out a frustrated cry of "FUCK!" Almost immediately, this random dude appeared and offered to change the tire for us. He also explained how to do it, so my friend wouldn't get stuck like that in the future. This wasn't some rare moment of kindess, either -- people in this city are generally pretty good about helping out when someone is in need.
I really wonder how paranoia-mongers like Michigan dude or "Don't talk to women!" chick would respond to something like that. See it as an outlier? Freak about it being inappropriate, regardless of intention? Assume the guy was sexist for wanting to help a woman? Shoot the good Samaritan?