Was looking around for a way to detect people AFK-Fishing and flagging them as AFK, not kicking them, just letting other players on the server know that they're AFK. Was really hard to search for though cause all the results were tutorials on how to build AFK farms or plugins to automatically kick AFK players..
Since I don't want players kicked and therefore don't need to worry about them looking for any workarounds, it wouldn't need the usual anti-workaround that most anti-afk-fish plugins use. Just a simple "If the player is standing still and repeatedly spamming the rod, then set them to AFK until they stop" kinda deal. Adding something like [AFK] next to their name in the tab menu would be perfect so if a player comes online and press tab they'll see who's AFK.