It means something alright, it means that you're getting calls from those with evil intent, or other factions unaffected by the DNC registry, like scammers, fundraisers, surveys, debt collectors, and political. Without it, you most likely would getting hassled even worse. Legitimate telemarketers abide by it while scammers could care less.
Got a call from 936-367-4087 while I was shopping. Checked the phone, did not recognize the number, thought "well, screw them" (lol) and did not bother to answer as it would be a total waste of my time. Not going to scam me.