@leocg Hmm, they must have thought that "blocked" meant to block the asking and allow automatically or something. Of course, with the current wording, when you disable, it sounds like the same thing. It sounds like you're disabling asking and allowing automatically.
Given the way the toggle and exceptions actually work, I think it'd be more like:
On=Ask to add site to allow/block list.
Off=Add site to allow/block list manually.
But, that's just me.