Mark Cuban talks with CNN:
One of the great things, and the key, really, I think, to a successful blog is that you have to be brutally honest. You can’t do CEO speak, you can’t do annual reports speak, because people in the blogosphere and your readers are just going to see right through it. … And particularly if you have a blog that allows comments. Because if you allow comments, and you’re just talking nonsense or just talking around a subject, you’re just going to get ripped to pieces in the comments. And it will act as a magnet for people who aren’t going to help your product or aren’t going to help your cause at all. So you have to be very careful. …
I’ll tell you one other thing that’s really critical in a blog that I have really learned from in my blog, the user comments. If you — when you come out and say something in a regular media, there’s not really an interactive discussion about what you have just discussed or talked about. On a blog, if I write something, whether it’s about business, whether it’s about the Mavericks, whether it’s about technology, one of the cool things is I know out of all of those hundreds of thousands of readers someone might disagree with me and really might have a better perspective on the topic than I do.
Exactly. Which is why I really, really welcome comments here. Even when a commenter disagrees with what I’ve written. Especially when they disagree.
Ed Bott 
Strange, I’ve been banned twice just for disagreeing with you.
No one gets banned for disagreeing with me. What makes you think you were? I have no one on my banned list who isn’t a comment spammer, to the best of my knowledge.
I have some fairly strict comment spam filters that reject several hundred (sometimes several thousand) bogus comments per day. I just looked through my logs and didn’t see anything that’s been rejected that appears to be a false positive. If you are trying to post something that gets rejected, send me an e-mail and I’ll look at it.
I disagree.
What makes me think so?
I posted some comments. You got angry and disagreed with me. Seconds later when I went to post, my comments no longer appeared?
Pretty fcking simple for me to think so…
I keep a log of every comment that’s posted to this blog and every deletion. There’s nothing in it that supports what you say. I don’t delete comments except on the very rare case when they’re obscene or when they’re comment spam.
You posted two comments on April 6, both of which disagreed with me and both of which are still visible, plus two this week. Your name and IP address don’t appear anywhere else in my logs.
Ed, I had to use differnt names, emails, and IPs to get around your blocking me. And a couple of times the blocks were eventually removed… don’t know why or when this happened, but it did.
That could explain part of it. There are some domains whose strings are automatically blocked or held for moderation. In that case, if someone posts a comment, it appears to go through, but it may get automatically deleted. And in some cases comments that are held for moderation can get deleted automatically if they arrive at the same time as a bunch of spam and I’m deleting a mass of e-mail.
Anyway, you now have five posts on my site, four of which tell me I’m wrong. I think that establishes my point pretty well.