This is terrible. The authorities definitely need to get on this.
It seems that groups which isolate themselves from wider society have similar problems.
There is one thing that the Amish have that the WTS doesn't. It's called rumspringa (Standard German: herumspringen - literal meaning is 'jumping around'). Apparently, teen Amish are allowed to run around and act like teenagers - parties, alcohol, teen sex, as long as they keep it on the down low, don't cause problems, use contraceptives, etc.