Thanks so much for these postings. I received 1st message which I ignored; second message came today 11:44 am from David Grey "message is intended to contact you regarding IRS; failure to ignore.. criminal federal offense". Same wording as May. I'm going to report to the do not call registry; not sure what else to do. I'm going to just ignore, again thanks to these posts.
Same call threatening me with federal criminal offense against me regarding u.s treasury. I think connected with another number 509 588 7421 with similar threats of irs