I've legit done this. I physically put myself between the creep and the lady with a surprised cry of "I haven't seen you since 3rd grade, holy fuck!"
She and her best friend both thanked me later because I artfully outmaneuvered him in a way neither of them could manage.
Catch my eye, flash a bit of cautious sign language my way, body language even. Hell, use a pocket mirror to catch light and flash into eyes. I'll pay attention, I always do, because no one should ever have to feel there is absolutely no escape or that they must endanger themselves to make someone else comfortable. I'm watching, I promise. pageant celebrity garments for girls