Jeff Atwood is only doing his job - promoting his blog and start-up. Doing a better job than most of us at that.
Sure he gets things wrong but so what? If we were afraid of getting things wrong we would never publish anything - and would probably also never learn anything new.
It's not the "getting things wrong" that bothers me. I don't mind at all seeing flawed, but honest attempts of writing.
What bothers me a lot is the whole attitude of shoot-first-ask-later. It causes excessive noise. He knows it, but he doesn't care, because it gets people talking about him.
He tries to control the conversation by saturating the channel, and the one filter that we have (the community itself) will go bust if we let the channel be saturated.
Just because we post some Codinghorror articles doesn't mean we have to post them all, you realize. He's not "saturating the channel," we are, and we can stop if we want, without having to ban anything.
Several posts a week is remarkably prolific for a genuinely technical blogger. I'm lucky if I write a post once a month, and that's because that's generally the minimum amount of time it takes to do something worth talking about, or gain an insight worth sharing.
Sure he gets things wrong but so what? If we were afraid of getting things wrong we would never publish anything - and would probably also never learn anything new.