This is a simple and lightweight plugin that I created because I personally dislike these farms and i know others do too.

If any tripwires/pressure-plates are within 1 block of the bob, It will consider it an auto-fisher (as autofishers need tripwires/pressure-plates...)

It will replace their not-so hard earned loot with configurable junk, useful, right?

It has a configurable (Default 20%) chance of lobbing TNT at them (The TNT will only affect them. no blocks, no entities)
You can also set the damage of it (Default 50hp)

By default, It will also tell the player why they're fishery is considered an Autofisher, by displaying a barrier particle effect where the offensive block is in located.

Note: due to this plugin originally being named FishinRoulette the config folder is likewise named FishinRoulette.

For 1.17 and below: you must disable "Show Barrier Particle" in order for it to be compatible, or choose a version below 2.1.0.