I have done exactly this! Given them fake credit number and other info, and kept them online for about 10 minutes. When I finally revealed what I'd done, I suggested they quit calling or I'd keep wasting their time if they did. I did this about 2 months ago. I've only gotten 2 calls since then. Before that I was getting 4-5 a week.
1-971-220-1966 is a SCAM. I bet they are trying to get personal financial information. The best route is the Federal Trade Commission to report a scam. When people work so hard to hide their identity, they are not a legitimate business. File a complaint with the Federal Trade Commission by calling 1-877-382-4357. They have jurisdiction over scammers and will be glad to take your complaint. The more they get, the more likely they will take action.
I revived two separate calls from these jokers on 10/18/2011.
I filled a formal complaint with the Do Not Call Registry here: https://complaints.donotcall.gov/complaint/complaintcheck.aspx?panel=2
People need to use this. As started here: http://redtape.msnbc.msn.com/_news/2007/11/07 ... call-violations ...there HAVE been some successful prosecutions, INCLUDING the FTC's present pursuit of a company soliciting "lower Mortgages": Global Mortgage Funding
"Since the advent of the Do Not Call list in 2003, the FTC and the Department of Justice have brought 34 law enforcement actions against violators and collected $16 million in penalties."