Ok, this just doesn't sit right with me, and probably never will:
Instructors who, in effect, play "God", by attracting those susceptible to such manipulation, and running their school for all intents and purposes as some sort of a modern-day "cult".
Such instructors do not even particularly need to have much skill, just have a flair for "pageantry", and run their little "program" on susceptible minds.
From what I have seen, the main reason that they get away with it, is a lack of understanding by the students as to what constitutes a normal teacher/ student relationship. As the student continues in this fashion, all ordinary boundaries are eroded, with the result being that the student has, effectively, been brainwashed.
Character is important in a position of trust, and the means must be consistent with the end. Students who feel that they are being isolated ("our school is the best-and-only, everybody else is baaad...don't associate, stay awaaay!"), denied personal dignity ("you are nothing, you are disrespectful.. don't make trouble, or you'll be kicked out!"), and otherwise prevented from effectiveness (participation, learning, future potential) should definitely take a serious stock of their situation.
There are other variations on being manipulated and used, including getting "buttered up", and offered position and reputation if you just so happen to be skillful or are just big and strong (by no particular doing of that school), and start to feel more than somewhat taken advantage of.
The good news is, last time I checked, there is a wide, wide world of opportunity awaiting, with a reasonable system of checks and balances in place, and gainful, wholesome training in the martial arts!
Best,
Michael