the reposting thing
I’m a little baffled by the appeal of crossposting one’s LJ comments to Twitter or Facebook, but anyway, it’s definitely a bad idea that you can do that with comments on somebody else’s LOCKED post (complete with links back to that post). So if you want to disable that for your own journal, it’s easy to fix in the LJ settings, and there’s also a poll going that apparently has gotten the attention of at least one of the LJ Powers That Be.