I grew up in the '70s in Western Ky. and fished all kinds of water. My dad would kill snapping turtles in farm ponds and gar in rivers because they would eat to many of the "sport" fish (bass, crappie). I think he regrets it now as he has a better understanding of the food chain, and not just about how many crappie he could string up and make into poor mans shrimp cocktail (smoked crappie is good).
Anyway, I'll never forget the barbaric rock bashing of the gar and the whacking of snappers by the tail against a tree.
I saw a snapper at a pond on private property the other day that was enormous, especially for up here. I'm sure he ate everything that fell into that pond.