My ex-father in law is an elder. He'd discuss judicial committee details at the family dinner table "for fun". We used to while away hours after dinner drinking wine and talking about brother-masturbator and what his favorite porn is, sister so-and-so who's been on a vacation with a non-JW man but assures us that nothing happened or brother and sister X who video taped themselves having sex and confessed to the elders.
It happens - 100%.
Not gonna lie, it was intriguing learning about the brothers and sisters in the hall. You'd never look at "poster girl pioneer" the same way after you've learned she has a dildo collection.