Just in response to your post *Jessica*... I am not disagreeing with you entirely... but just wanted to mention that I was one of those 'naughty' 'off the rails' youth, or at least semi-naughty... and becoming pg for me was the best thing that ever happened to me, and finally gave me a reason to fix myself up, and grow up.
And now you would never ever recognise me as the person I was in my teens (or in my case, even 20)

Although I understand that in the majority of cases this may not apply, it is possibly for some of these 'reckless or naughty' teens to have children, and have it change them completely for the better.