Jrnr, is right there I've used it on my Z3 to root it, it's OK if you know what you are doing but it's defo. not for the gen. pop. But this is off topic!!
I don't see why I should be either forced into updating the device or forced into seeing the notification ALL THE TIME!!
Yes security updates may be needed but then there should be 2 options 1.Security AND UI Update, 2.Security Update only.
AND ALSO
Rollback/Uninstall Update.