how do we get these calls to stop

I've been receiving phone calls from this number. I called back and the young man on the other end eventually became vulgar and harassing.

Terrible scam - received a recorded, threatening message from Julie Smith 415-506-1667, claiming to be an "IRS officer", demanding a call back.  I am so fearful that seniors or other vulnerable people might be harmed by this scam.  Please advise what can be done to stop these people, and hopefully fine and arrest them.

Many of those phony IRS calls are coming from India or Pakistan ... not much we can do to stop them.
The best defense seems to be "education".  Yep ... tell your friends, neighbors and others (both elderly and the young'uns) that the scam exists.

There is a fairly common IRS or "tax scam" being practiced by scammers on both Canadian and USA residents.
USA tax payers should read this:
http://www.irs.gov/uac/Newsroom/IRS-Reiterate ... -Telephone-Scam

Short answer:
The IRS never initiates a contact via phone.
They always send a snailmail first.

Educational post:
This scam is also described as scam #11, here:
http://phonehelp.2truth.com/facts_rev.html

Remember to return here, to 800notes.com, after you look at any of the information at that site, either to post more information, or to let us know you avoided the scam, or to read any further information about that number that others may post.

Call blocker.  The calls originate in either India or Pakistan and they will not stop.