Bowfin are a "Candidate Species" State wide, that means they have the potential to end up on the"threatened" list. It is recommended by the PAFB to release all bowfin. Check out their website, it clearly states that. Bowfin are native to PA and most of the eastern US and Canada. They should not be just killed because people consider them a trash fish. There is no room for that kind of mentality in the outdoors. Sure you want to remove "problem" non native species, that is actually recommended. But don't kill something just to kill it or cause it could eat your favorite target fish species.
Check out my article in the August issue of the PAOJ, it's on bowfin fishing in western Pa and proper identification between a bowfin and a snakehead. We have a very solid population of bowfins here in western pa, but statewide the population is not that strong. That is why they have the "Candidate" classification. As Spoonie always says "Get Informed" !