it really should be all machetes, shivs, rusty pipes, sticks (ideally with nails, bones, animal teeth etc embedded one way or another), slingshots and so on. I don't quite get it either. I somewhat understand it in zombie stuff but even then petrol is precious. But chainsaws do have the whole <insert whiny teenager 'but mom...' voice>"it's cool.."</insert whiny teenager 'but mom...' voice> thing going for them.
Still a more improvised selection of hitting sticks should get some representation I concur.