Guilty, of course, and many times too. In fact, guilty of 100 + mph on a couple of occasions. But since I am one of those annoying members who lectures people about the evils of racing on public roads, perhaps I had better attempt to justify myself.
100 mph, even on a deserted, dry motorway in perfect visibility, driving a safe and powerful car (a Celica and an IS200 in my examples), remains strictly illegal of course, but I don't see it as any more dangerous than most other kinds of driving - and far less dangerous than a perfectly legal 50 mph on a 'fast' B road with bends, oncoming traffic, farm turnings, pedestrians, badgers and side roads. In contrast, if I were to drive at 100 mph on a busy section of the M6 in pouring rain, that would be madness and would probably merit instant disqualification or worse.
Any good driver will drive according to the road weather and traffic conditions, and that may often mean driving at well below the legal speed limit, but it may also allow for the limit to be exceeded, in moderation. Speed cameras don't know this of course.
In contrast, racing powerful cars on a public road must almost by definition involve pushing things to (or near to) the limit. As such, it is inherently dangerous. Does anyone disagree?