Rummage around in here and you are apt to find PLENTY more!
Seriously, the bottom line is their arrogance. They are in denial that their setup fosters this kind of thing (all-knowing faculty, next to God in character know-how), yet do nothing to stave it off. Once it happens, it is somehow the kid's fault; THEY suffer the worst consequences. The faulty faculty gets a slap on the wrist, retains their job unless word gets out, and if word gets out, said faculty is allowed to leave and teach elsewhere with no further consequences.
The ultimate in professionalism, I say! (What profession, I have no idea.)