Does deleting weblogs break the Web?

Apparently, IBM has been deleting the blogs of former employees, something that has gotten some of the weblog luminaries in a bit of an uproar. The issue is that these purists are claiming that companies deleting weblogs is somehow defacing history, somehow violating the sacrosanct nature of the Web and the blogosphere. I can't see it, because in my view once you leave a company there's no reason why they should keep a historical record of your works or writing, particularly in as personal a venue as a personal or business weblog. After all, companies are liable for the material on their sites, whether from current or former employees.

Anyway, it's an interesting debate and one worth checking out: Erasing Blogs Does Not Break the Web

What's your opinion on this topic? Do you ever go back and edit your blog entries or even erase entries completely? Have you ever started a blog - or web site - just to delete it later when you find it isn't relevant to your current efforts?