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Douglas_Knight comments on Rationality & Criminal Law: Some Questions - Less Wrong
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I upvoted this to start with, then changed my mind. The statistics I've seen make alcohol clearly the leading cause of fatal car accidents.
Where did you get your data? I haven't been able to quickly find a chart comparing car accidents in general by cause (e.g. alcohol- vs. cell-phone- vs. fatigue-related).
Also, how do you define "dangerous"? There are various measures we could use (total cost of crashes based on repair costs, total fatalities, risk increase per trip, etc.) and perhaps the two causes compare differently on different measures.
Finally, what the heck does "status" have to do with this, as opposed to merely "public perception of the importance of a given issue"?
Some people claim that most crashes involves sleep deprivation, but I agree with Vladimir that we have no idea.
What is suggestive is two studies of one hour differences in school start times (americans drive to school at 7:30 at age 16). One compared Virginia Beach to Chesapeake. Better was when Lexington changed its start time. The student crash rate went down 16%. The state rate went up by 8%, so these are very volatile numbers and this could be data-mining. Also, day light savings causes crashes to spike. What's great about the school studies is that they're about practical interventions and not just assigning blame.