I knew of many teens who I found out later were not that “chaste” but were known for being excellent examples
Yes, totally agree. So many stories I can recall after I joined WT in my early 20s and hanging out with the teenages. Although remaining chaste myself while single. Some of the sexually active young one's got reproved announcements made. Then there were others that openly talked about their teenage sex experiences and nothing was ever done about it. I can relate what happened to me with my first witness girlfriend, we had been close friends for a number of years, then we found ourselves spending almost all our spare time together, just hanging out, doing it all the correct way we had been instructed. Then a single brother moved into our congregation, and within a few days, another brother who was a friend mentioned to me that this new guy was keen on my girl. So 5 days after he told me this i thought I would go around to my friends place to get an update, and who should find in bed under the covers together, none other than this new guy with the girl I had been friends with for so long. A week later she tried to deny everything between them, and I know nothing else happened with them, it was just a quick sexual get together for them. But that was enough of a warning for me.
I do wonder if the witness teenages today are has sexually active as they were in the congregations I was associated with during the 1990s.