Sub-categories based on privacy level
Short, concise description of the idea
The ability to see only public, protected, or private entries by adding the approriate word to the URL.
Full description of the idea
Just as we have custom friend filters and are able to view those filters by modifying the URL (i.e. viewing only entries from one friends group by going to username.livejournal.com/friends/groupname), I think it would be good to have something similar for a person's own entries... for example, username.livejournal.com/private would show a person only their private entries (assuming they're logged in). The same would hold for /protected and /public.
An ordered list of benefits
It would be useful to be able to see what who can see... for example, see exactly what's been posted publicly, see exactly what only your friends can see, see exactly what's been made private (without having to muddle through it all).
This is especially useful if a person wants to read over and muddle through their own private thoughts without having to browse through each day (assuming they don't make many private posts). I, for example, post my dreams as private entries and would like to go back and read over them all at once.
An ordered list of problems/issues involved
A hacked journal could be much more of a goody to get if reading a person's private thoughts were quite so easy.
The dimmer members of the LJ community might think that if anyone goes to a user's /private or /protected page, they can read all of those entries without having permission.
I don't know what sort of strain this would place on the databases and such. It seems as if it might be a bit excessive, but I know nothing of the technical aspects of LJ.
An organized list, or a few short paragraphs detailing suggestions for implementation
I would assume that anyone could view a person's public-only page, as well as their protected-only page if they have access to the entries there. If this isn't the case, a blank page would be displayed.