This is not phrased such that it can be said to be true or false. Yes, accessory to murder is a felony itself. Accessory to speeding is not, and being ignorant of the crime is the opposite of accessory. Would you like to rephrase your objections?

Car is dangerous. It's easy to kill someone by accident using car, just by pressing accelerator pedal long enough. Just compare number of killed or injured by a car and by a weapon. Car is still the most dangerous thing we have: http://www.vpc.org/regulating-the-gun-industry/gun-deaths-co... .