"Truthfriction, TrevorJ, Slawkenbergius: I assume you'd have the same reaction if it were your car? Or do you have some additional information not contained in the story the rest of us read?"

Well, of a sort: as it happens, Jason Chatfield's hometown of Perth is my hometown too. But I really did need to Google his name to discover that fact - I'd never heard of him. People around here just don't read free weeklies of the kind he cartoons for, and as such, they're simply not capable (in my opinion) of attracting the kind of notoriety that would lead to revenge attacks, payback, etc. Hence my preferred "mindless vandalism" theory. (And yes, of course I'd be incredibly annoyed if someone poured motor oil all over my car. Who wouldn't?)

Second that - where's the evidence this isn't just random vandalism of some kind? This guy cartoons for the kind of free weekly paper you get unasked-for in your letterbox (or so Googling reveals), so how controversial could he be?