"Please deal with this" -- seriously? How do you think anyone at an anonymous website knows who you are, what your number is, or can block calls for you? See if your phone provider offers call blocking, or buy a call blocking device.
Carol, how much was he asking for and for what years was he say you would be audited? I just hung up on him as the IRS would send a representative to you not what he has done and the strong arm tactic is B.S.
The IRS does not need to sue anyone. They send you first class letters delivered by the Post Office. Several of them. Ignore those, and they then send certified letters that you need to sign for. Again delivered by the Post Office. Ignore those and they simply freeze your bank accounts and anything else you own. If they can do that, then why would they bother with a court case that might take them years before they get in front of a judge? They also do not bother arresting people for a few thousand dollars for the same reasons I have already given.
Official IRS Government site detailing this scam and providing links to report it:
http://www.irs.gov/uac/Newsroom/IRS-Warns-of-Pervasive-Telephone-Scam
https://www.irs.gov/uac/Online-Scams-that-Impersonate-the-IRS
https://www.irs.gov/uac/Tax-Scams-Consumer-Alerts
https://www.irs.gov/uac/Newsroom/Phone-Scams- ... 6-Filing-Season
https://www.irs.gov/uac/Newsroom/IRS-Complete ... -Scams-for-2015