Forget ignored script allows you to completely forget about ignored nicknames. It removes them from output of /names command and even from other users' messages (though messages themselves are not ignored).
Download: forgetignored.pl
Ignores private messages from user after he/she has been banned. A lot of people think they would feel better if they offended operator who has banned them.
Settings: ban_autoignore_time <sec> - time for which user messages are ignored.
Download: banignore.pl