I don’t answer anymore unless I start receiving a legitimate message. (My answering machine does ask for a message to be left, but these scammers never leave a live one.) I never call back because tells them when you are home. Block the number. Get yourself a Panasonic phone system that blocks 250 numbers. A system with 3 handsets is about $100. Check Amazon.com for one. A nice feature is when these losers do call back; there is no ring to irritate you.