That phrase is a powerful tool for keeping people in line. It can be used to justify disfellowshipping or cause to fear disfelloiwshipping. This phrase defined my childhood and left me looking over my shoulder with panic as I evaluated my every action.
One of the first thoughts that went through my 12 year old head when I discovered that my "Elder" foster father was molesting my sisters ,was how can I stop him without "bringing reproach on Jehovah?"
You were right: cover up it was. Tell the elders and not the authorities. Not even the case worker. Tell no one . No reproach....my responsibility, my duty.