If you're following the rules, not always catching your limt and you will eat it I don't see a problem with it at all, in fact that's exactly what I do! I'd rather catch it then pay some to catch it who may be using a fishing method that isn't as environmentally friendly as me with my spear. Personally I don't have a problem taking lobsters, scallops, and some fish but I'd never go hunting for terrestrial animals.