In the 1980's I studied and practiced Buddhism at the Baltimore Dharma Study Group, part of Vajradhatu, under the direction of (deep breath) Vajracarya, the Venerable Chogyam Trungpa, Rinpoche. Actually, when I started he was just called Rinpoche, but he was given progressively higher titles later on, such as Vidyadhara.
Tibetan Buddhism teaches devotion to the teacher, a teaching not expounded by the Buddha. In time, I saw Trungpa's behavior, in particular the meat-eating, and I realized that to honor him was a violation of Bodhisattva vows of compassion to all beings. I now also believe that devotion to a teacher (other than the Buddha) is a subtle violation of Buddhist Refuge Vows. (The Buddha gave limited exceptions to this, such as a junior monk will study with a teacher for five years, while following the other Vinaya rules.)
Trungpa had many other behaviors inconsistent with the Buddha's teachings, such as drinking alcohol (he suffered from untreated alcoholism), rampant adultery, etc. He died at the age of 53 from cirrhosis of the liver, heart disease and lung disease.
He appointed his student Osel Tendzin as his Vajra Regent and successor, calling him "A good example of someone who has followed his guru's instructions." After Trungpa's early death, I had hoped that Tendzin might be an improvement. But the bisexual Osel Tendzin attained even greater fame when he gave AIDS to some of his teenage students, without telling them he was HIV positive.
Despite the awe-inspiring defense mechanisms of Trungpa's fiercely loyal and devoted students, the Vajra Regent scandals broke apart Vajradhatu. What survived was a side organization, Shambhala, which fell under the rule of his only legitimate son, the Sawang, Jamgon Mipham (later promoted from Sawang to Sakyong).
I had hoped that the Sawang might turn out to be an improvement over his Dad. When I found out that he had run a marathon, I was encouraged. Trungpa spent the last 20 years of his life half-paralyzed from an accident he had when his car ran into a joke shop when he was speeding at 85 miles an hour with his underage girlfriend while wearing monk's robes and had an alcoholic blackout. To his credit, he realized that by crashing into a joke shop the universe was trying to tell him something, and he stopped wearing monk's robes. This was the only example of insight I ever saw him exhibit. (He never acknowledged, though, that he had not actually been a monk for many years before that, and thus had been an impostor by continuing to wear robes. )
So the Sawang/Sakyong running a marathon seemed a clear indication that he was not his father. I had also seen evidence that Shambhala had become more sympathetic to vegetarianism since my departure. Unfortunately, I just discovered that the Sakyong fell into at least some of the faults of his father. More information on the scandals can be easily found by searching for "shambhala mipham" (without quotes). Though the Sakyong had imposed loyalty vows on his senior students, I see that there were many who had been in his inner circle who supported the accusers. This seems like an improvement over the way similar things were handled in the Trungpa/Tendzin days.
After I left Vajradahatu, I studied and practiced for a few years with the first Zen group in Baltimore, the Zen Center of Baltimore led by Sensei Jim Regensburg. Jim's behavior was not very different than Trungpa's, but at least he didn't teach devotion to himself, so that was a big improvement. He has a J.D., and told me one time in the 1980's that in the U.S. truth is not a legal defense from slander accusations. I don't think that is true, but with that in mind, I won't say too much else about him here. All of his core students eventually became disappointed and left. I formed and led a small group composed of his former students called The Essential Meditation Society, which lasted a year or two, as I recall.
Then I found the Theravada, which is both more authentic and a big improvement, and which I'll discuss (more positively) at another time.