I just got a call too on my cell, I called it back from a landline and it says "Hello, please press 1 if you would like to be placed on a do not called list" I stayed on the line and it just keeps repeating same message! what a way to waste peoples time!
Put the blame where it really lay's, with the criminals and illegal telemarketers.
The DNC works just fine. It is for telemarketers only and honest business does indeed abide by it. It is the criminals (which includes illegal telemarketers), frauds and scammers that do not. However, the Fed. DNC does not cover some survey's, Political or Charities. You would need to check your states DNC laws to see if these are under your states DNC laws. The fact remains that they are not automatic call blockers though and can not protect you from the calls that are criminal, illegal or fraudulent.
Do consider maybe getting a call blocking device or phone.. You can google them and many are around $60.00 or so.