Let me suggest something.
Quote from im2's home:
I also try to remember the last thing someone said, you can ask me what that is
by /msging me with said <name>?. And for
anyone that would rather not be remembered, just send me a /msg with the text
dont remember me, and I'll forget you ever said
Maybe something like this should be implemented in the 24-hour
log too. If someone asks, his posts would not be logged.
I don't think this would solve all problems, but it might
be good for some people to be able to stop or
start login apon one's will.