I admit to a little hyperbole, but only a little. I don't even bother googling the numbers anymore, just block them immediately. Then I get another half dozen calls within the hour with the same recorded message (or at least the first 2 seconds are the same) all from different numbers. Do they have blocking detection technology? It's clearly an arms race; before blocking there wasn't much spoofing. We could go back and forth for years, developing amazingly sophisticated electronic warfare... Or we could go straight to the punch. I wasn't entirely joking about the nukes, but I suppose a conventional air strike would suffice for a call centre. I've thought about finding their addresses and sending them letters containing flour, but while that might shut down a legitimate company for a few hours, these criminal enterprises care no more for their employees than their victims, so it wouldn't work. Bombs it is then.