It seems like a natural reaction to think about the past and mistakes or errors that were made, one of the most painful ones that I can remember involved a newly baptized sister with 4 children and a non witness husband. She was fairly new, less than a year active and the time period was the early 70s; became pregnant and she had complications during the delivery. The child was born but she was in critical condition and needing a blood transfusion, the congregation pressured the husband about her faith and wishes and he decided against the BT.
Sadly she died, he was left with the 5 children, including the newborn. For a while he tried playing the part of a JW interested person but finally he left the area and went back to another country to live with his family.
We lost track of him and I have no idea what happened to this family, looking back it was one of the biggest tragedies that I have ever seen and it pains me to know that her life was wasted for nothing.