To this day, I wonder why a '90s print ad seeking radio DJs specified, "no (name of broadcasting school I attended) graduates." Did that station's management think too many graduates of that school were unprepared for professional radio, or did they find their announcing styles too uniform or contrived? I thought the students at that school could be divided roughly into thirds. The top third of students clearly had sufficient talent to be on the air at a station in a large or medium market. The middle third had glimmers of talent and with sufficient practice and guidance could have worked eventually in a small or medium market. The bottom third, however, showed little or no talent and shouldn't have been admitted.
I wonder if the manager who placed the ad was concerned (s)he'd receive too many audition tapes from students in the bottom third of the school's talent pool.