No, you are the idiot by falling into the feminist trap,...

No, you are the idiot by falling into the feminist trap, thinking you are suggesting something new.
What you are recommending is the care that older men traditionally showed to younger women, by looking out for them and checking out their boyfriends, basically creating a field of protection around them.
Most fathers still try to do this, but 50 years of "smash the patriarchy" and "slut walks" have made the job very difficult.
Divide and conquer.