Not true, there are many machinery related deaths, mostly passenger vehicles every year.  The ability to understand driving patterns at a unfamiliar intersection goes up dramatically while under the influence of marijuana. A person under the influence of marijuana is impaired and is more easily confused! Do you ever wonder why many prescriptions drugs have a warning labels about impaired ability to operate machinery? What makes you think marijuana is any different?  Were you high on marijuana when you wrote your silly "Get a clue." comment?