Oppps, sounds like a rant 
Frustration, maybe, that when the developers give a simple procedure for something, users feel the need to ignore it and dream up another way (that would clearly never work) and moan that it doesn't.
No malice or offence intended to anyone 
As a consumer I haven't seen anything that resembles a 'simple procedure' from Microsoft for anything (let alone preventing the Win10 install.)
MS do seem to support big customers OK and presumably inform them of randomly named keys that they can add to domain policies to force things on to the PCs on the domain. Presumably consumers could do the same (using GPE?) to their home PCs but that isn't going to work for 90% of home users. What is required is a soft sales campaign to end users explaining what Microsoft are hoping to achieve and some honest explanation of what will actually happen if you do install it. They then need a 'user interface' to allow the user to manage the process (including various levels of opt out eg not today/not until next patch/not ever) not an automatic update system with a series of cryptic numbers and meaningless descriptions
Group Policy Editor if you have a non Basic version of Windows 7, or a direct registry manipulation if you do (but obviously you don't want to randomly click and import a random registry file

), is probably the easiest permanent way IMHO.