The D.N.C. list is for honest people/companies.
From my understanding, the D.N.C. list does not prevent/stop companies with whom you have recently did business wtih, including with in the past. Companies usually hire Telemarketers or Solicitors to handle there accounts with individual's who no longer do business with them. It also doesn't prevent Charities or any other type of fund raising organization from contacting you, asking for a donation.
Occasionally, a Scammer will be mixed in with these phone calls.
Telemarketers, Solicitors, including Scammers know when the "Best Time" to contact you and that is usually around dinner time or when you are trying to relax or just spend time with your family.
My solution and it's been working so far:
1) turn the ringer off on the phone  
2) let my VM take care of it            
3) kick back -n- relax
4) eat my dinner in peace and most important,
5) spend time with my family.
If it's important, than who ever is calling, will leave a message, if not, not important to begin with and since no message is ever left, I know that it was ROBO dialing in progress and that indicates to me, that it was either a Telemarketer, Solicitor or worse a Scammer calling.