The problem of giving up eating is that now we need to find a replacement method of dealing with the stress, anxiety, time related issue, or what ever the reason we were eating to start with. The real difficulty is figuring out the reason to start with. That is what is not being addressed in any of the programs, especially is the reason is stress refeed, an natural condition that exists after the stress has dissipated.
Some people use exercise. If exercise causes pain/discomfort/additional stress, it is not a suitable choice, it will not happen. There in is the crux of the problem, stop an effective method of treatment because of the side effect (weight gain) and not have a replacement for the effective method of treatment.
I will suggest that the real problem is life has become to stressful for the human genome, or at least some of the genome. There are those with no caring values, socio-paths, that do not have issues, and the Spock likes, but what about the remainder of humanoids with emotions?
Then there is apathy. http://www.ted.com/talks/dave_meslin_the_antidote_to_apathy.html Apathy is the condition of just not caring. It can be behavioural. We just stop caring about something that is beyond our power to do something about and is unpleasant or distressing to us. It is common method of dealing. We are trapped and nobody else cares enough to do anything about it. One way is to develop apathy for whatever, ourselves. Now What, if we do not even care about ourselves ...
Oh well. Be well, breath deeply, smile easily, and enjoy what life has to offer. Daoish.