I was just called too about some IRS court garbage. Telling me I have court in the morning. I told him to subpoena me and my attorney. He said ok and hung up. Looks like the messages on this site are in time sequence so they must be calling from a list.
Recorded message left on my voice mail informing me of an upcoming court appearance for "a federal criminal offense" and threatening that if the caller did not hear back "from you or your attorney, I can only wish you good luck as the situation unfolds on you". This was followed by a snotty goodbye.
Same as everyone else plan on messing with them on my drive home gives me something to do for an hour. lol Longer I keep them on the line the less time they have to scam a different person I figure