Now, I noticed that some people *hate* thread necromancy. So here is my proposal:
1. Creators of threads should be able to lock there own thread, which could help some people like in creating a roleplay but not wanting people to join as it's a WIP. You could even lock posts to WIP's because some people are dicks and reply to WIP's anyway.
2. Locking six month old threads. If a thread is older than 6 months old, than it should be automatically locked. And a moderator should be notified if you want to revive it.
3. Locking characters from your thread. Yes, it's like banning from some ones thread. It could also just pull up as say, a person doesn't like, ex01 user. You could prevent ex01 from seeing this post. Moderators can see all of this and if hate or anything is in these than the user that created it could be banned for a week.