moderators should be allowed to delete posts that are bad, delete threads that are bad (thread creators should be able to delete threads normally too probably), etc.
once we have permissions there could probably be a "moderation" permission. alternatively we might decide that moderation (deleting actually bad things etc) and management (other administrative stuff) should be separate. we do currently have a global "site admin" boolean on each user which doesn't actually do anything; maybe this could be expanded and turned into this.
part of: permissions