Have you encountered this (new?) scam/pitch?

It keeps legitimate businesses from pestering you.

It does not prevent scammers from pestering you - they have no interest in obeying the law anyway, and their caller ID info is spoofed anyway so the odds of being caught and fined are fairly small :(.

Listen to Mama, she’s completely right.

Personally, I think that it was a big mistake to allow the exceptions to the DNC list.