Originally Posted by TMNT
In the IT world, this happens often. At first it kinda bothered me, but now I've just gotten use to it. Sometimes, these recruiters actually have good positions worth considering (if you're looking). Their game is to call around hoping to run into someone with a potential background match who would consider a new job.
These folks get their names from many sources like jigsaw, linkedin, or any other contact database. If you sign up for professional newsletters, organizations, conferences, events, ect. that's how these folks get those names.
This - it wastes almost no time or anything and the possibility, however small, of a position that would be appealing is good enough of an upside for me.