I think to many JW youth leave the religion in the belief that they can go out into secular society that has a more liberal approach. To a point this is correct. However, this freedom comes at a cost, and there are still consequences for our actions e.g procreation and the best care for that life. Sadly, many in the above example soon come back to reality and find themselves in some very sorry states. I even personally knew of one ex jw who become a prostitute.
That been said I have often wondered, what the incidences of substance abuse, premarital sex, masterbation, domestic violence would be amongst the JWs. If it is higher than secular society then they surly do a good job of hiding it.