> PS - I flagged this article on purpose because I don't consider a random Reddit thread to be a legitimate source.
You should be flagged here then, not because you don't trust Reddit but because you haven't checked any other sources, including these linked in the comments here, long before you posted your comment!
It's documented by Microsoft:
https://support.microsoft.com/en-us/kb/3080351
"How to manage the Windows 10 upgrade
Automatic scenarios
The Windows 10 upgrade is automatically blocked (that is, no further action is required) on computers or other devices in the following scenarios: .."
Note: no further action is required to stop computer to being upgraded only on Enterprise!
"Non-automatic scenarios
You can manage the Windows 10 upgrade by using any of the following methods."
Managing here means -- you can read slowly the whole article -- the ability to disable automatic upgrade! No action taken -- upgrade happens. Even if you have hidden the previous update! You have to enter the proper new registry entry or group policy:
"administrators who want to prevent Windows 7, Windows 7 for Embedded Systems, Windows 8.1, and Windows Embedded 8.1 Pro clients from upgrading should enable the policy settings that are discussed in this article."
It's not that "no click" is needed, it's that the people who do that click don't have any idea what is going to happen, e.g. they are not the "qualified administrators" of their own computers. Like most of the people who let other people installing them software. Now it's just something like:
http://www.extremetech.com/wp-content/uploads/2016/02/Win10....
Dark pattern par excellence.
Hard to believe but true.