The fact that it's NOT a criminal offense at all and this is a scammer trying to scare you into paying? Anything to do with the Treasury or IRS is CIVIL, not CRIMINAL
Same description as one above. Said something about the Federal Government and that hanging up on them would do something. The connection was poor and could not be understood.
I just called back and told him, "I just wanted you to know that when you leave a message like that impersonating an officer of the treasury dept, I have traced your call and reported you to the FBI" and he immediately hung up. I may have fun harassing them more today.