Good filtering has traditionally been one of the killer features of userscripts for enhancing imageboard experiences. Things like filtering by image hash, regul

Good filtering has traditionally been one of the killer features of userscripts for enhancing imageboard experiences. Things like filtering by image hash, regular expressions and recursive filtering (also filter content that engages with filtered content; repeat) are pretty powerful tools for fighting abuse or, at minimum, making the daily grind not quite so terrible. Stuff like that is generally accomplishable client-side, so as a non-Twitter user I'm a bit curious why this isn't already a widely used thing. Makes me want to mess around with a browser extension that uses perceptual hashing to filter smug frog images or whatever.