Panfish Contest and Fish Fry
Bass tournaments used to be like this, now they are gone and guess what, better bass fishing for all.
Encouraging the keeping of as many big panfish as possible is a recipe for disaster...specifically a stunted panfish population.
The root cause for stunting in gills is too few big males. Without them, small males fish mature too early, which slows or stops their growth. Bull gills prevent smaller males from maturing, and therefore are the number one thing needed to prevent stunting.