No one is making any sort of ridiculous claim that "All anon posters are evil".
Yes they are and have done many many times. I'll quote a recent one for you.

Why? Because anyone who hides on a mule isn't contributing anything worthwhile, if they were, they wouldn't be hiding on a mule.
I actually said many of the most stupid and pointless posts are from named posters, that doesn't mean regular posters. That EU maintenance post sticks in my mind, I could name regular posters that I consider worthless to these forums and that love to flame/spam up posts but I would rather not make it personal.