Recently i could observe this group-phenomenon in a small German Forum. One Moderator caused a stir and 90% of the active members left the forum with him to another site where HE can be Admin on his own...
If looked at it from outside, with a sceptical mind, such movement is unbelievable. There is much energy in such a thing.
I don't think, you would forget your Bodhisattvavows too fast, Nilasarasvati. The one who wants to take grip of a person to manipulate must push the right buttons, otherwise he will not succeed.
The Buddhist Buttons are things like "I know more about dharma then you, and if you don't follow me, you will never reach your goal." This is effective.
But fortunately there are certain features a good teacher must have. To have them in mind can be a rescue against the wrong way.
Metta, Karuna, Mudita, Upekha
*** om vajra krodha hayagrīva hulu hulu hūm phat**