I believe that educating children about making choices they may regret later is the responsibility of the parents, not the law. Part of growing up is making stupid mistakes - hell it is part of being human at any age. Trying to write laws that protect children (especially those nearing adulthood) from making decisions they MAY regret later is near impossible.
Should there be laws against minors climbing tall things, because they might fall, break their spine, and become paralyzed? They'd surely regret that when they can no longer walk. Such laws fall under the standard complaint of a "nanny state" and precludes people from making educated decisions for themselves. Will people sometimes make poor choices? Sure, but we have the ability to learn from our mistakes and the mistakes of others.
Education, not legislation, is how we should help steer children in the right direction.