Back in the early 1980s when they were disfellowshipping unbaptized people (which they called disassociating), we had a lot of special needs talks. Most of the 12-18 year olds in the congregation were disassociated within a few months' time.
The announcements back then would be followed by a scripture reading about what they had done wrong. Imagine the sick &*(%$#@ing cultists announcing a 13 year old being ritually shunned for fornication!!! OMG! Then these were followed by a special needs talk about how girls needed to control themselves because they are like cows in heat and it is up to them to prevent sex blah blah blah.
There were others about clothes, makeup and hairstyles. Boys who shaved their sideburns, wore skinny ties or spiked their hair were not allowed to carry the mikes. (This was the 1980s.)
Girls who wore black pantyhose, straight skirts, skirts with slits, skirts that did not fully cover the kneecap--god they were focused on skirts!--lipstick, spiked hair, yadda yadda were unspiritual and bad association.
Then there were the anti-college talks. The only acceptable future plans were full time service. Planning for anything less is not putting the imaginary bearded sky daddy first.