Which is not a good thing. For she will be more likely to latch onto a bad man later on in life in order to get the kind of "protection" she got as a child.
I think your daughter is better off learning how to handle persistent suitors on her own. She needs to learn how to say NO and furthermore, she needs to develop the same kind of cutting wit as her father so she can effectively deliver that message for herself.
When she comes and talks to me about resolving an issue like this...I help her. This resolution is more of a tongue in cheek thing and not meant to resolve any truly serious problem. Believe me, as her father and having, with my wife of 29 years raised her through her teen years, she has the wit, and the capability of telling these guys exactly where to get off if necessary.
In this case, she is addressing a realtively minor issue, getting a few lauchgs from her friends, and letting her good ole Dad feel like he's helping out all at the same time. Win, win, win all around.