Anonymous is just the first of many future darknets that will be nearly impossible to destroy. You might take out a ringleader or two, but 4 others would stand up to take their place if they felt that it was unjust. And in the end, it's death by a thousand harmless cuts, or in this case, 1,000 users that don't like something running the their Ion cannons under central control. In this case, this dude is using social networking like facebook to figure out who are hackers. I doubt they have many connections to other hackers on facebook or twitter. It's most likely random unrelated acquaintances, so I think the guy's research is flawed anyway.
The best example of what one of these organized systems could do is a story by Bruce Sterling called
Maneki Neko. It is what happens when people get organized but maintain some level of anonymity. We are not to this level yet, but I suspect it right around the corner. It will do strictly good at first, but eventually it will ruin someone's life. Just as Anonymous has ruined some people's lives, they've done a little good for some, like a
great birthday. It doesn't justify the destruction, but it's bored kids on the internet, so what are you going to do?
The news media will make a big deal about future 'attacks', but some will be harmless kids having fun. But if you start to push that everyone involved in these groups must be destroyed, those people who are marginally involved will suddenly get VERY involved in your destruction. So be careful.