@DBActive"Don Lockwood" used to have a Yahoo group where he allowed photos to be uploaded. One fine day Yahoo deleted the group for a TOS violation, it appears that someone had uploaded some seriously nasty photos to the group and someone had complained, either to the police or to Yahoo. Don believed the two someones to be the same someone, and the wife who was currently divorcing him to be that same someone.
Yahoo were extremely unhelpful - no IP Addresses, no nothing. He founded a new group, with no upload of pictures by third parties permitted. Several of the people in the group changed the rules for their own groups.
My ex has a brother who went through a nasty divorce back in (I think) the 1980's. His wife also accused him of molesting their daughter and succeeded in denying him visitation rights. I have no idea what has happened later, but the last I heard was that there was still no contact between father and the by then adult daughter, and that the mother had died of cancer.