Back to the OP - Interesting scam, had not heard this one before!
Probably , if you entered some dialog and agreed sale, some kind of “you must pay insurance for item” phishing emails would follow..
The person did indeed have a daughter, so her initial reaction was absolute dread, thankfully her son was stood next to her at that moment and, being a cynical Gen Z'er, immediately called his sister, who picked up immediately because her brother never calls her. She was, of course, perfectly fine. The mam contacted the police about it but apparently there is not much they can do, especially if it was only an attempted crime.
These scammers clearly check Facebook profiles for parents of teenager/young adults and use what must be one of the deepest fears to try and scam them. Absolutely despicable and infuriating that they can't be stopped, only thwarted by people responding rationally.
Well, except my first ex-wife that had the signature on my account and emptied it right before escaping to the USA (when I was young and naive).