if you notice, i'm not arguing against punishment. The punishment is a must. The best punishment would teach the violator instead of just punishing per.se.

>Teenagers especially may be less responsive to consequentialist preventive measures (i.e. punishment), but they are responsive to some degree.

Exactly. The issue is that the more immediate/instant punishment works better for teenager mind than the chance of delayed/procedural/etc punishment. The immediate punishment is what helps the forming brain to develop cause/consequences machinery of behavior.