Interesting thread Avishai!
We had a girl in our KH who alleged she was 'reproofed' at 12. Her sister said it was due to her inappropriately climbing in laps of men in their previous congregation. Like many JW girls she was told the only way she out of her parents home was marriage and marriage to older men is normal in Dubbieland.
I was marked at 7..... while not DFd/reproofed it carried the same level of shunning most of the time.