The intuitive answer, an opinion shared by some prominent bloggers, is that once a commenter comments, they submit the comment with the knowledge they've lost control of that comment forever. Of course, there's more than one way to look at it, but there is also more than one platform (or publishing model) to consider, and at least a couple of legal aspects to explore.I subscribe to a bunch of website/blog marketing related newsletters etc that give me tips on a variety of related subjects. A lot of what they send is crap, but that was something I found a bit interesting.
A newspaper or magazine editor, for example, elects to publish response letters from readers. Not all responses are published, and thanks to some legal language, letter-writers are often informed they lose, to some extent, ownership of those letters.
In a sense, blog comments are similar. A blogger can elect not to publish a comment at all, or she can edit or delete a comment for various reasons. But there are stark differences, too. Most of the time, there is no written agreement about comments as there is with submitted letters. Another difference: Once a print publication publishes, the content can't be unpublished. Along some (strong) lines of logic, though this hasn't been fully tested in the legal system, this sense of permanency subjects print publishers to greater liability than digital publishers. - WebProNews