Perhaps you have a misunderstanding about how the DNC works? Let me help clear up that misunderstanding.
1. The DNC is not a call blocking service. You may have thought otherwise, but it isn't.
2. The DNC is used by legitimate telemarketers, so they do not call a number on the list. they can't be fined, and sued in civil court for damages.
3. Criminals and scammers do not abide by the law, so why would you think that they would obey the laws regarding the DNC?
However, you can help yourself instead of whining about it. If your phone is a land line, many telcos do allow to block phone numbers. or, you can purchase a call blocking device online.
If your phone is a cell phone, you can get a call blocking app.