Administrators (and possibly Moderators) are not affected by "Disable Board". They can still log in.
Why is this a bug?
I though admins should be able to log in, if the board is disabled. Who else should then reactivate the board again, if administrator are not able to log in?
Well the point of the ticket is, to state in the ACP, that disabling the board will still allow admins and moderators to use it.