Blogging can open minds, but it can close them too. There are a few in my reader that are there because they get a rise out of me. (None of you, trust me--no one that's ever commented here, and I'm certain they're not reading either.) No matter what these people say, I'm going to disagree and think they are foolish. Reading them is nothing but a boost to my own ego.
On other blogs, I'm strictly a voyeur. Of course all blog-reading is in some way voyeuristic, and if these people are putting it out there, they've agreed that it's mine for the viewing. But if I read your site regularly and I comment, if you know I'm there, I'm now at least friendly, if not a plain ol' friend. If I read my nutty former co-worker's husband's blog to find out what she's doing, because I just think she's weird, then that's ... embarrassing. Same goes for a another ex-colleague who has a lame blog of her own, slapped up to promote a book; I only read it to mock it.
I try to cut myself off, on the grounds that this kind of entertainment really isn't worth any of my limited time or brain cells. That only works some of the time. It's no worse than reality TV, right? At least bloggers aren't subject to the whims of editors and producers who have only a commercial interest in their life stories. (Well, unless they're on the Today show.)