I've got a Livejournal account. I'm fairly sure no one but me reads it, especially since I'm not in Japan any more (and my family no longer has an excuse).
Then again, I'm kind of a narcissist, so I pretty much write simply for myself, anyway. And considering I usually just write in it to gush about something (Fruits Basket being a popular subject), I probably actively drive away readers.
And if something seriously bothering me, I'll write it down, secure in the knowledge that I don't actually have to lock the thing down.