User blog:CocoaZen/What do you think about blogs freezing after 30 days?

I often find older blogs with useful content or which could be useful, but need minor updates. So it's frustrating to see that comments are no longer allowed after 30 days.

I've also seen blogs which had comments less than 30 days ago, but which were still frozen, so the mechanism seems to be somewhat faulty.

Do you think blogs should time-out or freeze? What are the "pro"s and "con"s?