DaasYochid: I’m probably a bit older than you and I have seen, way too often, parents kicking a child out instead of dealing with their issues proactively. I’ve also seen Yeshiva’s doing the same. Most of the time, when a kid has serious issues, there are specific reasons behind it and they can be dealt with effectively.
I guess when you’ve been actively involved in a community as long as I have, you see a lot more than most people.