Not all men.
Okay, snark aside, 1 in 3 woman will experience some form of domestic abuse, and 1 in 6 will be subjected to sexual assault or potential sexual assault.
So yeah, while only a small minority of men are rapists and abusers women still absurdly likely to be assaulted. So no, a woman would not be unjust in being concerned when she's around men.
And yes, the poster is badly worded.