I double-checked my settings to make sure it's not something that I'm inadvertantly doing already. It looks like you have to quite deliberately check the box in order to cross-post, so no worries there because I agree with you, it's a remarkably bad idea.

The whole point, IMO, of LJ is that it's an actual place to "journal". FB is like; "hey, look, a funny YouTube video" or "I had jello for lunch today" or "I have allergies...boo". FB and LJ...They're apples & oranges. Why cross-post to a forum that discourages journaling??