the problem here is that once posts reach the front page, few people bother to seriously curate if what they’re looking at actually belongs in the community it came from. … Now the top posts of a community start filling up with low-effort garbage, and eventually, it dilutes.

Character idea: a chaotic-good programmer who makes an army of “anti-dilution” bots to combat this effect by selective downvoting. That progammer’s name: The Antediluvian.