people who want to shout things to the world, but get all upset when we can tell what sort of things you shouted previously
I'd rather not shout it to the whole world. I frequently talk on mailing lists and forums where I expect there to only be a dozen or a hundred people reading it. Unfortunately the internet never forgets, and if I sign my real name to it, it becomes my legacy. I prefer to not have to think whether every random comment is well-considered and sensible. I just want to share an idea, not make a statement for all posterity.
As for Internet Fuckwards... Well, maybe people will say dumb shit because they're anonymous, but posting anonymously also protects YOU from being harassed by those fuckwads too. Let's say one day you post "Hey, Hitler wasn't entirely bad. He did a good thing with the autobahn!". Without anonymity, you now have some asshole - who may not mind posting under their real name since he's just protecting the world from you - following you for a few years in every forum calling you a nazi sympathizer and linking that quote. Posting anonymously you just make your little point and move on, internet fuckwads averted.
And I'm just some random geek talking about vaguely controversial things. There are far more critical cases like bullying victims who need a place to talk without attracting MORE bullying, or rape victims, or people who just need to talk about their dark fantasies or fucked up dreams. Anonymity protects you - it limits the damage to whatever nasty words someone can send back to your anonymous account. I would rather deal with those assholes than be physically hurt, stalked, and harassed.
Anonymity? I am so done with the concept, or trying to protect it in any way.
Then would you mind telling us your full name?