in my opinion (which everyone is entitled to) i thinks its incredibly irresponsible for drug users to drive under the influece of drugs. there are studies that indicate that while amphetamines can actaully sharpen your senses they also increase the chances of aggresive and potentially dangerous driving. beyond debate it is irresponsible to drive under the influence of any mind altering substance, and the choice you make to take drugs should be one made keeping the safety of yourself and others in mind.
people who drive recklessly UTI reflect badly on other drug users making the conscientious decision to stay off the roads, and in turn there actions has an extremely detrimental effect on the way drug users are already negatively viewed by a large portion of society.
drug testing might be the only way to keep people UTI off the roads if they dont stop themselves. if you're diving on drugs then you deserve to be caught and punished.
take some responsiblity for yourself, and stay off the roads if you've chosen to take drugs.