And I also report them to http://www.callercenter.com as suspicious so people are made aware of such calls. A lot of people may be already aware but there are still a few who may not be educated about the phone scams yet, so it helps when we share information to them.
I wouldn't hire anybody that initiates the calls, too! There's just too many scams around and it's difficult to trust cold-callers. Even telemarketers who sell carpets, rugs, subscriptions and even dish washing pastes, I turn them all down.