I would never, ever set my child up like that. If she found out that I set her up then where does the trust go between us as mom and daughter?
Moms are very correct on here.... the chances of stranger danger is low because most children who are abused, know the abuser. Teach her there are no secrets and if someone tell her it is a secret, then come tell you.
When my daughter was little, a neighbor mom and explained stranger danger as in the signal lights, red, yellow, green.
Green = mom, dad, brother, sister, grandmother, etc (you get the gist)
Yellow = some parents of best friends/classmates, people you know well but are not in your family
Red == people we don't know at all..... mailman, delivery people, grocers, etc we may see them often but not know them.
Another thing.. when my daughter was about 7 she expressed interest in martial arts. We had no idea she would excel in this. She is a black belt.