Ignore them. This is a group of Sex Perverts who are playing with themselves while they make these stupid calls. They are hoping that you swear at them and cuss them out. These people are really sick and should get help.

Report them:  

IRS Scam form:

http://www.treasury.gov/tigta/contact_report_scam_ok.shtml

Officer Julie Smith and Agent Chris Tyler are actually the same person. It depends on how they feel that day. Some days Chris Tyler comes out and other days its Officer Julie Smith. Interesting example of multiple identities.

I've gotten two calls today.  Recorded message from Julie Smith indicating that I should not disregard this call and to have my attorney or myself call them before they take action.  Two things tipped me off on this.  First, I really doubt the the IRS is calling people on Thanksgiving day.  Second the recording sounds like a computer generated voice which is broken or choppy like individual words were put together, not a continuous message.  I think the IRS has a big enough budget that they could very well buy better equipment than that.  I did a *69 and the number called from is 415-234-9651 same as in the message.    

irs scam call with 'or else' threat