Are Ferraris and Porsches condemned to becoming track-day-only toys? Europe already appears well on its way to outlawing ultra-high performance vehicles. Can the US be far behind? That's the question Bloomberg is asking. The culprit in the attack on sports cars isn't necessarily their speed, but the fact that they produce too much carbon dioxide. But they do get criticized for their speed as well. One British member of the European Parliament, Chris Davies, is actually proposing a prohibition on any car with a top speed over 162 km/h (101 mph). That wouldn't leave much choice for buyers unless everybody started fitting governors.