The downside of all this
Essentially, due to the flood of spoofed crap calls, I've completely lost the use of my landline. I just turn off the ringers and use it for outgoing calls only. Nobody can ever call me on it because if I don't do the above, it rings several times a day with crap calls that just waste my time.
I can protect my cell phone better, using an app the blocks any call not in my contacts, although it does allow them to leave a voice message (for those few calls I get from stranger which I actually want).
It's too bad we can't eliminate these sort of pests. Put them all on the B Ark, I say.