LongHasirGirl - I have to disagree a bit. I think the confidentiality depends on the congregation and the elders.
I was an elder a long time, and we did very well not talking out of turn.
True it's not foolproof, and some people like to show they are big shots about what they know.
I think what happens more often is that people put 2 and 2 together and think someone f#cked around. And that's true 90% of the time.
Don't get me wrong - JWs are the BIGGEST Gossip Whores you will ever find.
I have experience that to a large degree after fading.