In the past 2 weeks I received 7 calls from 'unknown' numbers. Being a very untrusting soul, my responses have varied from 'good bye', sarcasm, or vulgar profanity (DHS caller with distinct India accent). I have settled on an answer that works 100% of the time. In a very soft, cordial voice, "Hello, sheriff's department non-emergency number, how may I help you?" causes immediate termination of the call by the caller in about 4.3 microseconds. There are no 'follow-up' calls later. I label the number as Ign01 thru Ign10, shorthand for Ignore. when a label is full, I use the next available. Apparently Ign01, 02, and 03 are full.
In today's contentious social climate, no one wants to talk to the deputy sheriff.