I know I am. When my landline rings, I know that 99% of the time it is going to be someone I don't want to hear from.
The old Do Not Call Registry had an expiration date, but I guess they have changed that and now telephone numbers placed on the National Do Not Call Registry will remain on it permanently due to the Do-Not-Call Improvement Act of 2007, which became law in February 2008.
To register, go to
https://www.donotcall.gov/