I spent a while in the couchsurfing community. It was probably about as safe for women as having a job or being in a university. Now, I recognize that CS was more specific than seeking random acts of kindness on the daily, but a big part of what makes it work is that the vast majority of men aren't looking to assault women and will not stand for it, either.

I met a woman once, who was working as a waitress. She said she was a hobo before this job, but she had a daughter, and while she longs for the hobo life, she knows it's not right for a young kid.

Again, bad things happen, I am sure there are stories. If you expect to find a situation for women where there is no risk, best of luck to you.