When I first moved to Memphis (spring of 2001) and got a cell phone, I must have been assigned the number previously held by an escort, to judge from the weird calls I received late at night and early in the morning from various drunk and horny men. The most bizarre call being from a pimp who was apparently trying to track that woman down, and when he found out the number had been reassigned to a single guy, he pulled a 180 and tried to sell me on the idea of booking one of the girls in his stable for an hour.
There's another guy out there who trolls Craigslist ads in order to screw with people like you did with this lady's prospective customers; you might get a kick out of his website:
http://textastrophe.com/
Cheers,
bcg