Mischief Maker pt1

This is for this week's COW (Creature of the Week) over at ConceptArt.org.

Quoted from the assignment:

Round #199 Mischief Maker

Have you ever noticed that our dear Mascot COW actually breaks a few of the fundamental rules of COW? (lark and I did, and as a result we're going to have a new mascot after round 200. But let us celebrate our old mascot this round with a bit of a precursor and a chance to relax on those rules, the same way our mascot does now...

This round is about the troublemakers of the creature kingdom. Creatures that get off on annoying others and breaking the rules. In fact, this is a creature so intent on making mischief and mayhem, that it even breaks the rules of COW. This round, we will allow entries that break one (and only ONE!) of the following rules:
1a. No humanlike creatures
1b. No plants
1d. No accessories or clothing
or
1e. No blob-like masses with no shape

This round will be a 2-weeker as preparation for our month-long upcoming round. Make sure to really make your creature look actively mischievous, whether that is conveyed simply through the creature's visible personality or through illustrating it in the act of causing trouble is up to you. Bear in mind that Mischief Makers caught breaking more than one rule will be caught and dealt with appropriately (a swift kick in the poll), but have fun, let loose and break that one rule of COW you've always wanted to.
Deadline:
Wednesday December 29th, 2010. 9:00 PST (-8 GMT )

So here is my starting concept rough.  Going with a spidery critter as a nod to West African Anansi lore.  It's creeping around the city late on a snowy night stealing street signs and traffic cones, knocking over snowmen, and just causing as much mischief as it can.