Oh thats interesting!

Its under my profile, edit options.

I would think you would be able to change it from yes to no and vice versa. You arent "posting" when you do so, you are just adjusting your profile. I see it as two different databases, which are mutually exclusive. The yes/no only affects your ability to update the "threads / posts" database. It doesnt affect your ability to update the "users / profile" database.