To find girls I would do this:
Hire a girl, maybe two, to go around malls, shopping centers, downtown areas, parks, etc, and have them hand out your flyer to other cute girls and have them chat up the girls about you. Girls will always trust girls more! Pay the "recruiter" per hour or, better yet, $100 a girl she brings to you.
Your other points: I, too, worry about some of the issues you mentioned but, at the end of the day, these girls are ADULTS and they make their own decisions. Everything I do is 100% legal, the girls sign model releases and show their IDs. To have regrets later is normal - we ALL have regrets in life. Life Lessons can be hard to learn.
What pisses ME off is when a model comes back two-three years later and wants her shit taken down. Model release, remember?