Obvious anon detected.
The problem is LOIC traffic probably looks a lot different than botnet dDoS traffic, also in places where other internet access is monitored, it's a safe bet that if half their traffic that -isn't- pakits is IRC and 4chan, then you've got the right guy.
Also your second point is wrong because any time that anything like this happens only about half the people are legit "Anonymous", the others are people that just show up from slashdot, digg, ebaums world, etc to help, and there is a large amount of organisation. Just look at chanloligy, probably the most organized thing "Anon" has ever done. Good times.