I would not recommend Landmark courses to anyone under any circumstnaces--due to the steady stream of complaints I have received and the organization's troubled history.
In my opinion Landmark is not a "cult," but here are some helpful "coping strategies" used with cult members that may be helpful.
See [
www.culteducation.com]
For resources regarding destructive groups in Canada--
See [
www.math.mcgill.ca]