Man, in hindsight, the ewoks are kinda terrifying...
They were getting ready to cook Han before his friends noticed them schlepping him towards the fire...so we know they're down to chow down on some human...they collect helmets as trophies of their kills -- let's not dwell on what might've happened to the dudes inside those helmets -- and use them as instruments for their celebration; they can take out vastly technologically superior opposition with very rudimentary tech, but also show the ability to figure out new (and much more advanced) technology, insanely quickly...
Kinda makes ya think that the star wars sequels should just be about those little bastards taking the empire's tech from that moon base & using it to conquer the every-loving-s*** out of absolutely everything; as retribution for their fallen...whom we know that they mourn...
EDIT:
Like, look at this lil guy's headgear, then look at his cute little spear...that he probably used to make that hat: