There are so many variables that influence how individuals deal with their lives after leaving the JWs. Given that the JW environment itself is so conducive to blatantly aloof judgementalism and the apparent lack of love driving the judgementalism, it is no surprise that many who leave the organisation have lots of emotional pain and hurt. For them, the initial stages of recovery may entail expressing lots of good old fashioned anger. I would rather people express their anger through mediums such as this than they suppress it and end up hurting themselves more.
Anger, if drawn upon in a helpful way, is a very energising emotion. I like the way that people, who have been abused and downtrodden, can learn to draw upon their anger (after years of silence) and start re-building their lives in powerful new ways. Criticising the Watchtower without qualification or apology is an important way of learning to stand up for yourself. It would only ever be problematic if the person remained stuck in that mode for years and was unable to integrate their experience in a more rounded way (i.e., able also to acknowledge other emotions and yes, even good aspects of their involvement with the JWs).
I am much more worried about people who have left the organisation under tragic circumstances and who carry around inside all their pain and hurt but are just too afraid to make sense of it and who even remain under the "spell" of the Watchtower. In many cases, they turn their negative emotions upon themselves which in worst case scenarios leads to clinical depression and suicidal thinking. No, its far far healthier to let the anger out - "the abusers" need to be called to account. steve2