On 08 Oct 2018, "Percival P. Cassidy" wrote in
alt.comp.os.windows-10:

But what about when numbers are spoofed, especially when the call
appears as a local number? What if a local number is blocked
because it gets used by some robocaller a few times, and is
blocked when it is actually a neighbor calling from that number to
tell me that some family member has ben involved in an accident?

I spot-check the numbers and I don't find any evidence of that
happening. If it does, the number can be reported as having been
blocked in error.

I'm willing to risk the tiny chance that a valid number will be blocked
for the benefit the service provides. It's not perfect, but it's the
best tool I've found.