I guess he won't fish in a pond or lake without any tributaries either. Its a barrel regardless if its 55 gallons or 55 billion gallons. He would probably also omit fishing for most trout since many are not native to the streams and trout are stocked from hatcheries.

You might as well add pheasant to the list of "exotics" also. Many of them including the common pheasant came from Asia. Lets eradicate all the wild mustangs too. Its an invasive species too, correct?