13 yo DD can do it too. Me, DH and her will be somewhere, get back in the car and meet each other's eyes. She'll say, "did you see that bloke?" I'll say "brown jacket, jeans?" And she'll agree. DH will be all like "huh? What?" At 13 she will see the creepy bloke who is looking at one of us too much.
She's had good radar since she was a toddler though. I used to work in homeless shelters and clients would come up and chat to me when they saw me with her. Regardless of what they looked like, and some of them looked pretty rough, she would only leg-cling when it was one of the problematic ones. DH has no radar.
I always wonder if she's subconsciously learned from me or if it's because I didn't suppress her feelings. None of the "honey he's FINE, hug him" with relatives.