https://en.wikipedia.org/wiki/Scarborough_Research

As of 2013, Scarborough marketers were not empowered to remove contacted individuals from their lists on request, citing privacy concerns, leading to complaints from an antagonized pool of potential respondents.

{ this Wikipedia article is not up-to-date }

Hey folks, now I have to say that this call is legit! It is the Nielsen TV and Radio rating company. They are the ones that want you to rate different programs. They will send information by mail for you to fill out a brief survey. In case some of you didn't know, there is MONEY inside those surveys. You may have been throwing them away without opening them. However, I have received over 100.00 in plain cash for participating in their surveys. Ther's no jokes, scams, personal information wanted, etc. They just want you and your household to participate and fill out the survey. I always look forward to their mailings. They only send it once a year, and they will CALL you to confirm you got the survey. Again. there is real money inside those mailings. I am NOT trying to promote this company, just making yu aware that you're throwing away money by not opening those mailings.

No message left called my number today and yesterday as well. I'm sure it's a scam, I don't answer numbers I don't recognize.

I have begun receiving these calls regularly.  I thought we had it bad until I read some of the other posts here.  Apparently, there is no police help even though I consider these calls harassing in nature.  The people are pushy and belligerent.  I find it hard to believe that a company as well know as Nielsen would engage in such tactics.  They are offering consideration for a service, which I think would define them as telemarketing calls.  My number is on the National Do Not Call registry- little  as that helps.  It makes me angry that I pay state, local, and federal taxes on my service and not one level of government will prosecute them. I have considered buying a police whistle to keep by the phone so that the telemarketers will get  an ear full when they call. I have no problem making crooks miserable.

Don't bother with a whistle or a air horn; you will hurt your ears more than you will hurt the caller's ears.