Although Landmark, like their "spiritual" predecesors, the scientologists, are pretty aggressive about going after anyone who might harm their reputation or bottom line. You sort of have to operate under the radar, but their are public critics and anti-cult activists who were involved with Landmark. Check Carol Giambalvo's site, if you haven't already. I posted her essay, "The Hunger Project Inside-Out," on alt.fan.landmark when the Landmark legal department asked her to remove it from her website. ( AOL actually shut down her website when Landmark officials complained.)
Landmark are pretty good at busting up marriages. The programs often make people self-centered and arrogant. In the early days, adherents were called est-holes. They know that people are their most vulnerable and manipulabe after some major loss, and the lonely make the best "slave-labor," or "assistants."
You may contact me, if you like. (I am not a deprogrammer or exit counselor but my posting address is deprogrammm@MailandNews.com