I stood in front of a stinking Porsche diesel last weekend, but I take it you don't count that one as a Porsche
I do dislike those stinking small diesels driving around. And the sound makes my ears bleed. They should get rid of those as they don't serve any purpose here except for tax evasion, but what about trucks and trains, they can't live without diesel (yet), and adding even more taxes on the diesel fuel isn't helping anyone either. We still need transport, more dilemmas...
There is 100% Bio-diesel around, but not near enough for total conversion, and a lot of people might starve as well.