[astrobe_]

Is it?

The crucial flaw of public comments is that they can be used to address other people than the author; hence spam and trolls for instance. And what's the ratio of actually useful comments anyway? Does it justify the cost of dealing with all the rest (like, say, your blog going down because some comment DB broke which directly hurts your actual readership)?

One-way communication has its advantages, too. Those who really have something to tell you can always use email.