I have no deep problem with exclusion; as you say, that’s human nature and unfixable. Making mods personally legally liable for everything that appears on their board is just insane. How many minutes are acceptable for them to see and review content? Or does everything have to be pre-approved?

I know a local blog that pre-approves every comment. He lets a lot of stuff through, because he lets people be dumbasses. If he were personally liable, the conversation would get a lot quieter.