do not bother me when NCIS is on!!!

I have received multiple calls over several days from them.  Have no idea who they are - most likely telemarketers.  I don't know anyone in Salem, OR or anyone who would be trying to contact me from there, and they don't leave a message so it must not be important.  It's a complete nuisance.
I am a registered voter, so if this in conjunction with getting folks to register to vote, I shouldn't even be on their lists.
I'm on both the National and State "No Call List" - I shouldn't be getting any of these telemarketing calls.

09-25-2012 @ 6:00 PM; 971-208-9977, OPINION POLL.  When phone rang, saw that it said "Opinion Poll" on the caller ID, so told wife, let answering machine take it.  When that came on, they hung up and didn't leave a message.  If it's one of those robo-calls, if you answer, it will continue talking no matter what you say.  What I do in those instances (other than hanging up) is press the # key so phone beeps, and continue doing that until they hang up.  From blogs read, this call came from Elkhurst Communications, and is a political survey.  Internet search shows call came from the Beaverton, Gresham, Portland, Oregon area.  If you let them continue to talk, then it will cost them or their clients money.  Sometimes I just set the phone down on a chair and let the damn thing continue to talk until they hang up.  I like some of the people's suggestion - give them wrong answers on every question.  Better yet, stick a shotgun up their [***] and pull the triggers!!!

HOW TO STOP ROBO CALLS. Change your Phone on Voter Registration to your Local FBI, SS, DEA, Sheriffs Office and send all these ROBO POLL calls to the Very Govt that Gave Out Your Private Unlisted Number! and Tell Everybody you Know to do the same thing. and Don't Vote for ROMNEY OR OBAMA the Very People that Harrass YOU! Vote for RON PAUL Just to SPITE the Guys BUYING the Prez Seat!
all that Money they spent will be down the drain!

They call twice a day every day, not at the same time of day. Second call is a couple minutes after the first one. Sometimes Caller ID says Opinion Poll, sometimes Private Caller.