I served as an elder from age 28-33, looking back, I was woefully underqualified to be determining such things as being DF'd. I felt self conscious in the hearings and looked for reasons NOT to DF rather than reasons TO DF, this was unpopular, and I often relented due to worrying about how the other elders would view me, embarrassing now to think about.
I did serve on one committee regarding alleged child abuse. The accused was maybe 15 and the victim maybe 2 or 3, too young to speak yet. I advised the victims parents to consult authorities as I felt we were unqualified to determine this matter. The committee's focus seemed to be mainly to settle between the families and to not reflect badly on Jehovah. We called the Service department and were advised to handle as discreetly as possible, with sensitivity and to be cautious since no witness to the event. The "evidence" causing concern was the little girl being sensitive in her private area and having redness. The boy had been babysitting the girl. Ultimately he was reproved and told to not be alone with kids. The victim family changed congregations. I cautioned my wife as were parents of 2 young children and were neighbors of the boy. I was unable to warn others, in retrospect, I should have ignored that direction.
Irony, this boy later worked at one of the restaurants I was in charge of and was witness against me for smoking that led to me being DF'D. This was a couple years later after I had been deleted for stated reason of not presiding over my household (my wife had stopped believing and stopped attending and was very bitter over the organization). I had become depressed, desperate, lost, and disillusioned, and sought worldly friendships, this led to drinking and smoking.
Anyway, my two cents on your question.