Question for all fellow freelancers for contract positions

Hi fellow freelancers! First, I think we should all call ourselves something other than freelancers as it has a bad connotation everywhere you look now and clients who only read the "free" in freelancers, lol!. Anyway, I wanted to ask if any of you have been contacted by these so-called companies/temp agencies in nyc who claim to have contract positions. The main person has a very common english name, but when you get on the phone, someone with a thick Indian accent speaks to you then asks for the last 4 digits of your social security and promises to submit you for whatever contract position they claim they have. I get these almost daily now and feel it's a big scam. Something reeks of BS here, but not sure if any of you have encountered something like this within the last six months.