You know, you *can* make seperate filters within your /friends and make posts that can only be seen by them. That satisfies my itch when I need to share a dark secret and get honest criticism on it. Just because you've approved 50 people doesn't mean you can't share something that's really bothering you with a select, trusted 14 of them.
Also, I'd suggest you stop caring so much about what other people think. Posts who specifically name names and a list of gripes associated with that person almost always turn into gross drama bombs, which is to be expected.. I find the people who make those kind of posts often get what they deserve in the backlash, but it's still their journal and their choice to write about whatever they want.
I've always tried to be very honest in my journal, because IMHO, if you aren't, your lying about your own life to yourself, on a medium meant to document one's life, and .. why bother? Just get rid of it. You can have a private life or you can use your journal as an outlet of well needed catharsis, but never both (99% of the time).
When I bring my journal back, I have lots of horrific posts about the last year and a half of my life already written to be put up, and I don't give a shit what kind of reaction it gets. Yea, you'll be on the filter that sees them too.
Just say what's on your mind, but own the consequences :)