-same thing, followed by the same the message form a different number, -515 973 1977. Do people really fall for this?

female robo-voice claiming to be from IRS.  Final warning that IRS has filed a law suit.  Assumed it was a fraud and if the IRS thinks I owe them money, they have more effective ways to get to me.  I am wondering if this is in any way related to the IRS data breach from a free months ago?

It is not at all related. Just a group of criminals in a foreign country calling every number in sequence hoping to catch someone naive enough to believe their lies.

Mike in MD is right, this extortion scam has been ongoing for several years. Most of the calls are coming from India and Pakistan.

http://www.irs.gov/uac/Tax-Scams-Consumer-Alerts
http://www.treasury.gov/tigta/contact_report.shtml
http://800notes.com/forum/ta-8c2f64bf2b91fa5/irs-warns-of-telephone-scam

http://bigstory.ap.org/article/4b849c65e54346 ... leader-irs-scam

Report the Calls to the real IRS here:
•report the incident to the Treasury Inspector General for Tax Administration at 800-366-4484.
•You can also file a complaint with the Federal Trade Commission at FTC.gov. Add "IRS Telephone Scam" to the comments in your complaint.

******
Do consider getting a call blocking device or phone.. You can google them and many are around $40.00 or so.If its a cell phone, some already have call blocking, if not, there are free apps on the web that will work for some. You can google this. If you have a smart phone, there is a free app called call control. Iphones appear to have apps also. Another one is called Mr. Number.

For tracfone & straight talk:

https://play.google.com/store/apps/details?id ... .tracfone&hl=en
http://extras.straighttalk.com/en
http://www.youmail.com/home/carriers/straight-talk/block-number
https://www.straighttalkwirelessforum.com/viewtopic.php?f=6803&t=55006

On 10/22/15, I received a robo call claiming the IRS was filing a lawsuit against us and saying we could call 206 973 7888 for more information.  Thanks to for your helpful posts, I know not to inquire further about this.