There was a protest against 4x4s in paris a few years ago. Some group was going round and finding parked ones and letting the tyres down, then if the car was also sparkling clean they had buckets of mud and paintbrushes. They'd also printed off spoof parking tickets saying "this is what it's supposed to look like", or "why do you need a tractor in the champs elysée?" etc. I was quietly impressed with that, fair play to them.