So once again you're back to saying that it provides evidence of another crime. But many people are saying the anonymity becomes a crime itself when in the context of another crime. I'm kind of bothered by that as it puts a liability (or a chilling effect, if you like) on being anonymous, something I do every day and cherish very much as an important aspect of my privacy. Even though it won't become relevant until the day I am (perhaps wrongly) accused of another crime, suddenly it will become a very huge liability if that ever happens.
Now if you say the anonymity crime is "planning and preparing to commit a crime" then that's (sort of) OK. Once again, the anonymity is part of committing a separate crime that I can at least rationalize is wrongful. But if you tell me that the pure anonymity itself is a crime then I'm very disturbed by that.
That's because State Power is not, contra popular imagination, based on a monopoly of violence, which only exists nowadays thanks to the triumph of its real source. It's based on legibility: by abstracting the world and identifying and naming its subsystems, the State creates its own power. Naming and identifying people is a natural part of that: indeed, adding last names to a first name to create a (ostensibly) unique global identifier was one of the first projects of the modern State. One hundred faceless people you have to monitor at the moment is far more dangerous than a thousand identified people you can attack after the fact.
Honest question: why is that? Why is it not enough to charge someone for the actual crime they committed? Why does someone need to be charged for committing it a specific way?