I think I can speak a little bit on the subject of suicide, since both of my parents have made suicide attempts recently, and since I also struggle with depression and, although I'm currently too stubborn to seriously consider something like suicide, I can tell you it does seem to be an attractive option some days.
Suicide is not completely a personal choice. Part of it is a problem with mental wiring, yes, but a significant part of it is also environmental. Suicide is far more prevalent among people who view themselves to be in hopeless situations, whether financial or otherwise.
I hate to resort to analogy, since everyone always then argues the analogy instead of the subject it's trying to describe, but if you have an engine that redlines at 5,000 rpm and you redline it for a while and it self-destructs, you don't turn around then and say, "well, that wasn't the driver's fault, that was completely the engine's fault."
Aaron made the sad decision to take his own life. Ultimately, yes, he made that decision and nobody else did. But that doesn't mean that there isn't some responsibility to go 'round. He made that decision because of the future he believed he was facing, because of the situation he believed he was in.
Also, the entire point of this article was that MIT did have at least one good reason to defend Aaron: self-interest. He was as much a symbol of what people believed was a hacker ethos at MIT as anyone else of his generation. The message now is clear: hackers are not safe at MIT.
"Just following the rules" has never been a socially acceptable defense for bad behavior. Sometimes the rules are wrong, and the wonderful thing about humans -- when they choose to be human -- is that we have the ability to judge a situation and decide when to bend or even break the rules.