I’m a little late in this, but regarding the latest LJ kerfuffle: I have not enabled any links between LJ and Facebook or Twitter, so nothing posted here by me will be cross-posted to those sites automatically to my other sites. It would be best if users prevented such cross-posting of their comments, but I rarely if ever post anything private.
I do occasionally manually cross-post my own entries if they’re music-related. This is so I can occasionally add something to my MySpace profile in the vain attempt to make it look less moribund. I cross-posted my 8/29 entry to add a note to the Charlie Monterey Facebook page, but it was manual and strictly me-related.
It’s not just LJ, by the way. I noticed Yahoo added similar social connection features recently, and Google is always adding stuff. They’re all bound and determined to entangle us.