Not really understanding the source of your ire, but you may want to check your facts. According to the Electronic Code of Federal Regulations at ecfr.gov Title 47, Part 64, §64.1200 Delivery restrictions:
"(6) Maintenance of do-not-call lists. A person or entity making calls for telemarketing purposes must maintain a record of a consumer's request not to receive further telemarketing calls. A do-not-call request must be honored for 5 years from the time the request is made."
Offshore social engineering scam. Calls originate from U.S. based phone numbers but most of the time they will be VoIP and not tied to a major phone company. Chances are the Caller ID is spoofed half the time to evade detection and throw people off their scent.
If you get a call like this, just hang up. Block the number if you can and know how.
This number calls me EVERY week. I have asked several times for them to put my number on their "do not call" list and I have spoken with the manager as well. However, they still continue to call me at least once a week and they deny they do it.