These aliens seem temptingly fragile. They would make perfect targets to aim at when cane toad whacking. There is something appealing about treating that kind of threat with complete and utter contempt. Take them out with projectile vermin!

Since there are only a couple of thousand aliens around using such an inaccurate cane toad launching mechanism will just serve to make the fun last longer. But if more of the aliens start floating around upgrading the targetting system could be viable.