Just another addition to the list. I returned to grad school this year, and these guys have been calling me incessantly for at least two weeks. I did the call back trick and tried to get them to stop calling, but that was clearly a fake message because the calls kept coming. I finally picked up the phone while at work which would give me an excuse to tell them I had to hang up. When I told them what my actual program was, Urban Planning, they told me to enjoy my studies and basically hung up on me. They also asked me if I was a US citizen, which made me chuckle in my response.
Repeatedly I have been receiving telephone calls from 1-971-220-1825 and the Caller ID says Pactel.
A message is left each day that this telephone number calls me, but there is no voice (human or automated) in the message and the message just offers silence.
I called this telephone number and it has some automated voice that says (to paraphrase) that some company has called me for marketing purposes and to press a certain key if I do not want to receive anymore calls. I press that key to not receive any calls in the future each time I have called this 'phone number in response to receiving a silent message and the automated voice says that it will take 24 hours to process and that then I will not receive anymore calls. Yet for a couple of weeks I have made these calls in response to the silent telephone messages and today (15-MAY-2012) yet again I received a telephone call (and silent message) and I called back and pressed to not receive calls and YET AGAIN the automated voice said that it will take 24 hours to take effect and that I will not receive anymore calls.