I think almost everyone goes through a period of, well, at least very deep sadness when they discover ttatt. Most liken it to a bereavement; and the subsequent five stages of grief...numbness, anger, bargaining, depression and finally acceptance.
Do you mean experiences of someone simply not recovering, or getting "stuck" in one of the stages like permenant depression or anger?
I think having support either through exjw sites or counselling would hopefully prevent that. Also the immense feeling of freedom would be a huge preventative for any of the above.
I think its far more dangerous not knowing the truth and risking being DF or just not being able to continue going to meetings through age/disability/depression etc etc. The misery of being trapped feeling "less than", failing god or being rejected by your peers is far more likely to end in tragedy.