I think every person needs to use common sense about who they bring into their lives, and exercise a degree of cynicism about things that you are told. That applies to everyone; male, female, young, old...
I think we should be teaching all children basic safety and common sense. I plan to teach my son about nasty people, and how they can appear nice, and I plan to teach my daughter about nasty people who appear nice.
When I was 12, I got to watch a master manipulator take what he wanted, and to leave carnage and tears in his wake. I was too young to be deemed useful, so I was ignored, but he messed with my parents, grandparents, cousins, aunts and uncles (he was a second cousin). At 12 I couldn't believe how easily he was taking all these grown ups in. Thankfully, someone outside the family really didn't like him, as he was shot dead on his doorstep (something to do with drugs or sleeping with a kingpin's wife, we never got the full story!).
Maybe I should consider myself fortunate that I saw a decent amount of emotional abuse at an early age, and I made the decision never to tolerate any of that cr*p.