From your description I'm not sure how extreme your friends eating problem is - exactly how healthy, then how crappy. But if she "eats for a lot of reasons that she cannot control" then going to a boot camp is not going to help her root problem any more than the other failed exercise programs have. She needs to seek professional help to resolve the "reasons she cannot control". Eating disorders have many different faces, while she may not fit the classic diagnosis of anorexia, bulimia or compulsive overeating, she may be one of the many who fit in the ED-NOS category - eating disorder not otherwise specified. Kind of a catch all term for people with eating disorders who are not outlined in the classic texts. Its a very real disorder. If its not too sensitive a subject (well anymore then telling your friends she's looking fat and needs a trip to bootcamp) then recommending a therapist/counsellor would be more helpful in my opinion. Good luck!