I'm on the Do Not Call Lists.
I occasionally get illegal calls; however, some businesses are exempt from the Do Not Call list. If you have an account with a firm, they can call you. Charities can call you; political parties can spam you till the cows come home which is why I unplug my home phone until elections are over. I was getting 10 calls a night during the last Presidential election until I unplugged my phone. Fixed those buggers!