If research shows that there has been no major decrease in bass or other native fish I don't see the point of killing them honestly. From what someone posted earlier seems like snakeheads are a regular diet for peacock bass and LMB bass in south Florida. I have only caught 2 since I started bass fishing 6 months ago. Where I caught the 2 snakeheads I caught 10x more bass of all sizes. I think if your not gonna eat them or put them to good use, release them back. They reproduce way to fast for us to even put a dent in their population down here. If you wanna kill them then go ahead but when you start missing that amazing fight no other freshwater fish down here puts up then u might regret it!