Big Mike,
It isn't the faceless, nameless GUESTs in Mudcat I fear, it's the faceless, nameless FBI agents secretly going through my home, secretly tapping my phone, my voice and email, my snail mail, my office, without any warrants, and once the warrant becomes required, being able to file for it in a jurisdiction far, far away where I have no means to fight it in a court of law (like Washington D.C. where the FBI is, and I'm not).
Let's get real here--anonymous Internet posters aren't exactly a threat to anyone's privacy or personal liberties, no matter how annoying you find them.
For myself, I don't find them anymore annoying than a whole lot of people who post their names, frankly, but each to their own.