Thanks redbird, i have read that as well.
But, I guess the question is would there have been a way for the SK to know that MB,MW,MBB and possibly SG were not from NY. I guess AC would be iffy except for the fact that she is tied to coming from NC? Besides getting to know them...
I learned the answer to this question several years ago while searching for someone in my family who was lured away from home by her "boyfriend" (just like so many of these girls). The answer is that 90 percent of the ones who advertise online with their photos are from out of town.
The easiest clue are the area codes of their cell phone numbers. If you search the Long Island ads on backpage or craigslist you'd struggle to find any phone numbers with the local 516 or 631 area codes. This seems to be true for most major metro areas. Also, those websites have a link to "see previous ads by poster". When the links are clicked, a pattern emerges with many of them doing a rotation between Long Island, NYC, Boston, Philadelphia, Washington DC and sometimes Albany, Chicago and Atlanta (Googling the phone numbers in the ads also reveals these patterns).