Let my answering machine pick up because of the tons of spam calls I've been getting. Do Not Call is a joke! Man with a heavy foreign accent kept saying "Hello". Didn't leave a message or identify what company he was calling from.
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 getting a call blocking device or phone.. You can google them and many are around $40.00 or so.If its a cell phone, some already have call blocking, if not, there are free apps on the web that will work for some. You can google this. If you have a smart phone, there is a free app called call control. Iphones appear to have apps also. Another one is called Mr. Number.