You can't DFa sitting GB member simply because that would draw into question any decisions they were involved in while being a GB member. You have to make it look like their wicked course (DF-able offense) happened after being removed... Or after stepping down from the GB. At no time would they admit that a child molester or other "gross sin" committing person was in the GB.
To much face to save.
Maybe that's why they hide the paedo list...?