"Ultraviolence" is the title track of Lana Del Rey's second full-length LP.
Lana Del Rey said in a Kulturnews interview that the song was about her time in New York when she joined an underground group. It was run by an extremely charismatic guru.
From her Grazia interview:
"I used to be a member of an underground sect which was reigned by a guru. He surrounded himself with young girls. He thought that he had to break people first to build them up again. At the end I quit the sect."
Then, people was saying that either Jimmy Gnecco was the leader of a sect, was participating or it's a different Jim.
Well, I went a little deeper...
It is speculated that she is talking about Atlantic Group, a part of Alcoholics Anonymous, which she joined in the past. They were notorious for their cult behaviour and treatment of older men and young women. The Pacific Group (which AG is a branch of) is partly run by a man named Jim.
In Google you can find a list of The Cult within AA, where they show "The Wall of Shame" and the names.
There you go:
Pacific Group Members:
Clancy Imislund
Michael Quinones
Jim Boch
Searching a little more you can find an article with an audio of Jim Boch en 2010 where he speaks at Atlantic Group about being sober and the cult.
If you google the name "Jim Boch" you will find a few of small pictures of the guy, and, he looks so much like that man: