The Consumerium trollgnaw is where trolls come, or are sent, to bite each other on the leg, and gnaw away on each other. It could be seen as a sort of duelling POV, or just amusing for everyone else to read. Insults are expected, common, and creative. This is the troll equivalent of the Consumerium:village pump - any troll there should be sent here instead.
Consumerium:gnawing_at_the_roots (of the world tree) is a somewhat more civilized process, where instead of gnawing on each other, trolls gnaw on someconceptual metaphor that they deem, in their trollish way, significant.
Let the gnawing begin! And let poor sports be driven off by trolls: