I see a lot of people writing about how they change their MAC address all the time so what did Aaron do that was so wrong?

Granick writes in a well-read post about how Swartz didn't really break any laws -- everyone on MIT's network was legally entitled to download JSTOR as fast as they wanted to and apparently MIT had no right to keep anyone off its network.

There's a pervasive social norm that says 'if you can use tech to get something, then doing so is legal'; lots of people find the CFAA normatively absurd, in the same way that we might find a law against eating asparagus on sundays absurd. You see that in all the defenses that start from the premise that not only is Swartz innocent but that there's no conceivable crime he could have committed.

> apparently MIT had no right to keep anyone off its network.

What? How could some institution not have a right to keep somebody else off its own network? That makes no sense at all. Don't forget both JSTOR and MIT (after JSTOR contacted them) tried to block Swartz's massive downloads.