What has worked for me quite well over the last few years was answering the phone without saying anything. Spammers usually are dead silent as it’s just a voice recognition bot waiting for a “hello” or similar and hang up within a couple of seconds if nothing is said. Regular people have “static” most of the time. I’ve had a few recruiters call while having their mic on mute, but they start talking themselves fairly quickly.

Thanks for getting into the specifics!

No, it’s not just EU. Proton mail is the first one I saw, haven’t checked for others.

As comment in another post said - this is for modules only. There’s still a ton of binary fluff that is the main cause of issues and that is not getting open sourced.