Why do folks leave the church after youth ministry?

Youth ministry creates a certain feeling of community, once the students leave the youth group setting they search for that same feeling of community and cannot find it in adult ministries.  Adults are boring and the students fear that once they leave.  Youth ministry tends to have a more accurate sense of family found in Acts 2 where we share what we have together, go on trips together, go to school together so they are with each other most of the time, share meals together and are generally more involved in the lives of each other.