Just because you didn't hear about it doesn't mean it wasn't there.
I was in the White Rock congregation (Dallas, Texas) in the late 80's. I confronted my father about his abuse of me when I was pre-school age. Of course I got the elder visits about two witnesses, forgiveness, wait on Jehovah, yada yada.
I was told, however, that I was the only one to have ever made this complaint in "Jehovah's organization". Each of those 9 elders sat in my living room and told me no one had ever made any such complaint before.
Fast forward 13 years and I met someone on this very board who happened to go to the White Rock congregation at the same time. They were a child back then, when a family member molested them. Their father was an elder and the matter was reported to the body. At the exact same time I was making my statements about my father.
No one in that congreagtion knew as the elders hushed it up.
My point is, with all due respect, that just because you have no personal knowledge does not mean there was no child abuse.