No, I don't want to completely disable it. I want it like vBulletin, where an admin can set it so that the WYSIWYG editor can be set to off for all users, but they can individually turn it on if they want to.
I don't want to prevent anyone from using BBcode. A WYSIWYG editor and BBcode are not the same thing.
I suspect most administrators just expect their members to configure their settings as they wish and I don't believe anyone else has asked for it to be globally disabled so it's not a feature which has any demand.