Mongrel. I'm not sure if it's worth getting the repairs covered by insurance, or whether I'm better off just paying for it myself. Ah well, I should just feel very grateful that I can cover the cost if need be.
A few people have expressed the hope that karma will bite the offender, hard. I rather think that it already has; what sort of life must you have, to be so full of anger frustration and envy that you would lash out with petty, pointless vandalism like this?