Telemarketers: how do you get them to stop?

<p>My DS is usually very quick to catch a scam, but replied to an ad for a car. Fortunately he send me a copy of the email and I told him IMMEDIATELY it was a scam. He had already responded by asking them for the car’s VIN # and said he would not deal with Paypal protection or an out of state vehicle, but would look at if if it was local. Needless to say he heard nothing more from them.</p>