Of course, I have long since added this list[1] to my openbsd firewall. That is besides the point, I can (and do) also block all crap in my browser via extensions. That doesn't make the crap they are pulling legal and I refuse to click "accept" on the popup that is currently locking the machine from being used. If it does not change soon I will reclaim the license money via microsoft directly or court.

All my important machines run operating systems that do not have spyware built-in.

[1] https://github.com/crazy-max/WindowsSpyBlocker

That'll work while they continue to use dedicated hosts (eg, telemetry.microsoft.com) to collect the exfiltrated data. With a single update they can shift that collection stream to another host (windowsupdate.microsoft.com, or a skype host, etc) such that blocking it would break other stuff