Don't be fooled. Landmark Forum is the natural successor to EST.
My wife's son, daughter-in-law, and niece all went to Landmark a couple of years ago. Just like EST, in order to graduate to the next level you have to proselytize your friends and relatives and invite them to your graduation ceremony. During the graduation, visitors are led off to other rooms where they are shamed into joining themselves.
"Look at the change that has taken place in [person]. Don't you want to support those positive changes? The best way to give support to your [relationship] is to take the course yourself. If you sign up tonight, you will get an immediate [dollar amount] discount."
Then you have to admit your weaknesses [or make some up] in front of the group of strangers. One question that I found particularly troublesome was posed by our group leader: "Think clearly and be absolutely honest. What do you do most often that your [relationship] would find offensive. Smoking? Masturbation? Sneaking snacks? Cheating? Pornography?" You're often doing this in front of your spouse or other family members. Not my idea of fun at all since I admit to many vices (like spending too much time on the computer).
In many ways, Landmark uses most of the techniques of EST, but just not so abusively. They also have similar mind control techniques used by Scientology. Werner Erhard (not! - his real name is John Rosenberg) was known to be a fake and a con-man who lied about his education and . And yet his corporation still has its hands in the Landmark mix for consulting.
My stepson was totally messed up for months after attending Landmark. When his mother and I refused to buy into Landmark's bullshit, he thought we were rejecting him. His controller/sponsor (or whatever they are called now) basically told him that his mother wouldn't support him and didn't love him enough to join in. And me, I immediately became the evil step-father married to his mother having ulterior motives.
It took us nearly two years to get the family relationships back into a more normal mode. I recognized what was going on immediately because I had been through the first couple of stages of EST some 20 years before at the urging of my boss. I didn't want to go, but he was supporting me for promotion and I didn't want to piss him off. He later was fired for pressuring some management trainee too hard to join EST.
I'm telling you the same thing I would tell a potential JW convert: Get the hell out while you can. Even if you survive, the hidden damage could last for months or even years. It's just another money-making cult. Kind of a cross between Tony Robbins (another shyster) and Amway/Mona Vie and the Moonies - except "god" is more of a presence than a personality.
JV