I personaly hope not ...
I mean, if that will be optional part of settings, i see no problem since i never turn it on.
But i really dont want to have blocked out higher dificiulty, just bcs someone was unable to resist hiting "quick load" button, and therefore it had to be disabled by dificiulty settings. -_-
Honestly, this is just another example of situation that will never ocur, if you had at least some self moderation. :-/
