How did it work out for him? For Aaron's causes, his constructive rather than destructive approach worked fairly well, creating change and earning wide awareness and respect.
I wish he'd stuck it out; had there been a trial (and possibly sentencing), the public would have learned many of the same lessons about overzealous prosecution, the JSTOR project, the CFAA, the obsolescence of copyright, and importance of open access. Plus, he'd still be with us.
I also believe Aaron's causes with regard to copyright and censorship will succeed in coming decades, easily within his natural lifespan, and he would have helped them succeed faster, so I'm sad he'll miss it.
DDoS is destructive (unlike any amount of copying) because it disables access and functionality and effectively censors content by blocking individual learning and communication. It causes more resources to be be wasted on paranoia and layers-of-defense. It causes a hardening of positions and growth of suspicion. It is much easier to portray Aaron's supporters as 'vandals' if they help by actually committing vandalism. (I'd guess that as an 'applied sociologist', Aaron understood this well.)
That these DoS effects are often temporary is no defense: it's destroying people's freedom-to-communicate for a time... and the early death of a young person should remind you that ultimately all we have is time.