Pretty reasonable:
First, if you've got something in your hands that can outperform Crown Victoria and Charger interceptors on the interstate, you're going to be relatively easy to spot – you won't be doing this in a stock Toyota. Second, you've got Little Brother to worry about – if you wax someone's doors at double the speed limit, they're probably going to call the police. Instant update to last known location and direction of travel, which allows retriangulation if you managed to create space.
You probably haven't, though, because even with vehicles capable of impressive top end speed, there comes a point where the vehicle is so functionally light you can no longer safely operate it in real world driving conditions. My top speed running code in a Crown Vic was 134 mph, which was frankly stupid – the suspension was floating so badly that driving over a heads-up penny probably would have sent me into a terminal fishtail. This all means that, while you may maintain some semblance of distance between yourself and the point car, you're very unlikely to be completely leaving them in your sonic wake.
(Hat tip: Kottke)
The Dish 