I have received 18 calls in the past hour. The last one I picked up and it was the end of a recording saying only "Goodbye".
I'm on DNC list, but does no good. It's not enforced. I read about suing them, and you can win a case but not be paid, so that doesn't help. It's really creepy and annoying.
I think I'm going to get another GV phone number to use for everyone I don't personally know and only give my real # out to close friends/family.