Since when does hacking necessarily involve benefit? It's a clever exploit, getting by without license plates, and I can imagine how that might be satisfying on its own, for purely aesthetic reasons; it doesn't need to be practical.
Of course there's no name.
That's because this is an Internet post, not a car that can be used to maim and kill people.
Perhaps Jobs' strategy for avoiding license plates was "antisocial criminal activity" and perhaps it wasn't; I'm not a lawyer, and I don't really care - but what does that have to do with the question of whether or not it was a hack?