When I was in my preteens, my family showed up to the KH for a meeting one evening to find that the tiny windows we had on the doors were shattered. Turns out a sister who had mental health issues and marital problems had done the deed. From what I understood, the elders talked to her and she agreed to take her medication, which she was not doing before.
A couple of weeks later, the same sister showed up to the KH, proceeded to disrobe herself, and started pulling the flowers out of the flower bed of the adjoining CO home. Needless to say, the CO was terrified. Police were called, and she was arrested. She was then Df'ed for not keeping her promise to stay on her meds.
Not too long after that we came to the meeting to find one handle missing on each of the doubles doors to the KH. Apparently the sister, angered by her disfellowshipping, threatened to burn down the hall while people were in it.
In hindsight, I feel bad for the sister though. She needed immediate and intense mental health care, and no one stepped up to help her get that (although at least the elders told her to take her meds, which was surprising).