“they should work on the crap like tumble weed, star thistle, cheat grass, zebra mussels, mitten crabs etc...”
Asian carp, walking catfish, boa constrictors, anacondas, pythons, snakeheads, Canadian thistle...
I guess we should throw commies in there too, those ****ers are definitely not native to North America and they are a destructive species with no redeeming value... ;-)