Funny enough, change a few words and this is approximately how the Namakomo consensus and its descendants (including ETH PoS) operates. Upvote (attest) wrongly on a post (block) and your reputation gets hurts (up to being slashed). Although, this requires a critical mass of reviewers (just like we needed 525K ETH to launch the beacon chain), it can’t be automated the way a PoS node does the work on behalf of its owner (unless ML starts assessing posts for suitability), and it has the potential to cause PTSD/fatigue in the reviewer the way you describe. Interesting problem for sure.