Samuri swords make fine weed-whackers. Machetes suck.
Now you've done it, next on the list is bound to be electric weed-whackers. Ya know, I bet a boomerang could do some serious damage, but the aborigionies should play the race/ethnic/tradion card. Ooops, cards flung sharply can also do damage. And then there's the baby eatin' dingos and boxin' roos...