In my Council, EBOR are convened by the Troop Committee, and a rep from the District Advancement committee serves as a member, and signs the Eagle App on behalf of the Council.  We are there to ensure the EBOR is conducted properly and no inappropriate questions or "retesting" takes place.  In the many I have served on, there have been no issues, except for the one time that it was disclosed that the candidate was a new father and "living in sin" with the baby mama.  The Troop Committee was more upset that the SM had blindsided them ("I didn't think it was relevant").  The vote was not unanimous, so I had to recess the EBOR and the scout appealed to Council where it was rubber-stamped.