Drugs
I know someone who is really grateful for her drug rehabilitation. She started taking drugs before she was even a teenager, and before she even knew what a drug addict was, she was hooked.
Ok the first point is that some idiotic drug pusher thought it would be a great idea to push drugs down a school child for their pocket money I presume! However, had the girl not had the possibility of a second chance, she would have had her life ruined and over before it had even begun.
Places like stone hawk give people who need and want a second chance a chance. This girl never stood a chance had it not been for someone to help her through it.