Fidelity bonds to enforce vibe checks might be an interesting innovation to see in some forums. Kick someone's ass through the screen via taking a tiny amount of money from their wallet if they are, at moderator's discretion or through some other consensus mechanism in the community, really being an asshole. This would put a price on engagement (the opportunity cost of the use of a few sats for a few minutes) and would put a large penalty on acting in bad faith on a regular basis (loss of the sats repeatedly).