Well I guess I was over thinking it. I was using Jolly Roger but after a few months don’t see it as beneficial. JR can be fun and entertaining, but really is not worth my time. It would collect several dozen a day, most with zero audio. Some had a little and very few were funny as some doofus would spend several minutes talking to a robot.
Of course you want callers to be able to reach you, but I think almost always a real caller will leave a message. There’s a difference between blocked and voice mail picks up!
On a modern iphone, Do Not Disturb is under something called Focus. Took a while to figure that out. In your DND you have notifications available from apps and from people. Put everyone you want to be able to ring you right now in there and voila! Everyone else friend or foe goes to voice mail. Out of 30 or 40 calls today I had about half a dozen bots that managed to record something.
How you do that on an android I don’t know as I gave up on android a couple of years ago.