droid — A woman with children is less likely to be a molester out looking for a victim. Obviously you can never be 100% sure about anyone (including policemen, etc.). But if a child is in a situation where they are lost and have no choice, I teach my children to look for the following in THIS ORDER:
1) Policeman in a uniform
2) Worker behind the counter in a store with people inside
3) Lady with children
I don’t think it likely that my kids would be somewhere without any of these 3 categories.
I also think aries ideas are great, especially with regard to making sure your child has your cell-phone number with them at all times.