My two cents is if anyone does not understand the windows update settings options and refuse to alter them according to what they want should not be surprised if win-10 is installing in front of their face one day :)
I have yet to see any win-10 related update classified as Important
One exception might be kb3112343
https://support.microsoft.com/en-us/kb/3112343
And one for ie11 KB3139929
https://support.microsoft.com/en-us/kb/3139929
Everyone is so interested in this one update when there or others classified the same and are related to win-10 and telemetry sending too
KB2952664
KB2999226
KB3035583
KB3075249
KB3013531
KB3021917
KB3068708
KB3080149
KB3123862
http://www.ghacks.net/2015/04/17/how-to-remove-windows-10-upgrade-updates-in-windows-7-and-8/