1) There are some who unfortunately need to leave, because we can’t help them and they cause more problems than we can handle. G-d indeed loves Barney Franks – and He gives them 11 months after they leave this world to do tshuva (in cases where He, for whatever His reasons, does not wipe them off the earth before the age of koreis ends). “Shygetz Aross” does have a place, and we need to be mekayem “ubearto hara bekirbecho.” I always said that if Chabad would say “Shygetz Aross” (meaning clean its house of meshichisten, as well as of those that came in for a free ride because the door was too wide open), and kanoim would say “We Want Moshiach Now,” Moshiach would come.
2) Kids go off because of mixed messages, like the ones that come from certain posters here. In some cases, the problem is one set of messages at home and another in school. In other cases, it is because confused kids turn to the Internet to find answers they like rather than the right ones.