In any case; currently, you can block anonymous users from posting to your journal. How about the ability to block them from reading particular entries as well -- without blocking random LJ users from reading them? Distinct settings for "Public", "LJ users only", and "Friends only".
Justification: like a lot of people I'm going to link LJ from my website and I may not want just anyone wandering in from my site to read entries intended for an LJ audience.
Give it some thought; thanks!