There will come teachers who act as if they are me, though they are not. They will claim to be my tulkus, but dismantle my tradition. They deceive many with teachings of demonic and unknown entities. Nonhuman forces prop them up and promote their celebrity. Such teachers of erroneous paths cause the Dharma to decline. They don't practice (Dharma), but only talk and only intensify desire. They contradict what they teach and what they do, and indulge in corrupt activities. Without gaining any confidence, they are zealous to teach others. They lack any intention of benefiting others, but focus on self-interest. They lack moral discipline. Dharma will be left just as a shadow.

-- Padmasambhava, Guru Rinpoche