Or let any user offer moderation duties and give every user the ability to change/revoke who is moderating their feed. /r/spez;always_good/politics, for exampl

Or let any user offer moderation duties and give every user the ability to change/revoke who is moderating their feed. /r/spez;always_good/politics, for example, could specify the politics feed minus anything spez or always_good marked as spam or off topic (rather than using whichever mods you've set for your account).