I wonder if anyone at CNET remembers being around that age. I did the same thing, with the same script kiddie software when I was 13. My ISP had it's mail servers knocked offline for 4 hours that night as 60,000 or so emails piled up in a school adversary's parent's mailbox. My local dial-up ISP, being rational, simply cut off my parent's account. No other action was taken.
A couple of apology letters from me to the ISP and target later, my parent's dia-up account was restored/reactivated. I learned my lesson and no great harm was done.
By labeling such juvenile pranks as 'spam' people's wrath can be gathered quite easily. The proper distinction between this and the spam most everyone hates, once made, makes even the punishment given out in this case seem too great.
Obviously when one is dealing with objective law very little room can be allowed for context and non-emprically statable variables to influence justice. But in the situations of the type above I believe there is adequete 'wiggle-room' in the statues to allow for case-by-case interpetation. If this can not be done, perhaps it is the statues themselves that need to be reconsidered.