A felony on someone's record may make things a little more tough, but it does not necessarily destroy their future.
For someone who is already borderline... I'd say it would.
Whatever happens, I hope it's not "just punishment" but rather a true lesson.
Kid's like that don't respond to punishment, ...at least not the way we want.
For them, punishment just makes them tougher and stronger, ...and more determined not to get caught the next time. What he needs is a true lesson in understanding the ramifications of his actions.