Seriously, why the heck someone would post such stupidity on Slashdot? Everyone knows there isn't a group called "Anonymous". It's just a bunch of perverts with nothing better to do, doing it for the lulz. Most of them can't tell the difference between TCP and UDP, but one doesn't need to know that to install LOIC and fire up a load of nasty packets to a predesignated target. They don't know what the fuck they are doing, they just got a informational image on 4chan describing where to download LOIC, what goes where, and they are all set. It is like this incredible stupid hive with no one leading, one just follows the neighbour without asking questions.
And regarding the traceability of such people, seriously? People are actually doing studies on this? Give me a fucking break. They are anonymous in the sense that one doesn't need to sing up on 4chan to post, nor identify oneself. That's all there's to it. 4chan keep all their IP address logged, they know it and they can't care enough to use proxies.
They are trolling the world, and it is sad that timothy has taken the bait.