Being an asshole is not a crime. I'm not saying pressing charges was a nice or even moral thing to do; I'm saying it's stupid to expect the local authorities not to prosecute the actual, identifiable crime of destroying someone else's property.
And again, nobody seems to have established what the original crime was - Psychologically abusing someone? Are we going to define "making a fake myspace profile to verbally abuse someone" psychological abuse? Where do you draw those lines? Are we supposed to enact draconian laws to protect borderline cases like this one, knowing full well that they're going to apply to a hell of a lot of cases where we don't want people going to jail (Like the "psycho ex-girlfriend" example someone proposed)? Or should we just leave it to the lynch mob to decide?