These people have been blowing up my CELL PHONE.THey calla nd hang up after one ring. This is beginning to become harassment. I am on a DO NOT CALL LIST and will look into it for HARASSSMENT.
Crooks don't really care about the do not call list. You are right, this is harassment and the best thing to get your privacy back is to ignore and block the calls. Many calls are from outside the USA, but use "spoofed" numbers to trick you. This is BIG Business. Check this link: http://800notes.com/arts/where-to-report-phone-crime
And: http://800notes.com/arts/harassing-phone-calls-what-to-do