There were often two personnas in many Jehovah's Witnesses. There was the Hall one and the Home one. And some cases, there were wide differences between the two. I remember one "brother" who had the reputation for being "kind and helpful" to the brothers. At home, he was beating his wife and kids. I'm sure that this kind of things is still happening in the congregations.
Many of the "secrets" that the elders were aware of became public knowledge when they shared the information with their wives. The proverbial "grape vine" of gossip was widespread in all the congregations I attended over the years. The prime source of it was the elders' wives.
I think the reasons for this was the limited sphere of most Jehovah's Witnesses. Since the organization is the whole life of most of them, the petty and mundane events (occasionally the scandalous) in the congregation became a topic of gossip. Whether it was out in field service or at the Kingdom Hall, gossip was a vital part of the lives of Jehovah's Witnesses.