So, you want to be an internet terrorist, but you don't want to get caught. Well, here's a great idea: publish a guide detailing exactly how you're going to do it, so investigators already know where to look for incriminating evidence.
Curious about how Anonymous works? Treat yourself to a look at their Security Starter Handbook. If anything, you'll come away with a better understanding of how to protect your identity (and identifying information) online.