Maybe a different technique of enforcement?<p>In the state I live in: &quot;No person may endanger the safety of any person or property by the negligent operation of a vehicle.&quot;<p>If you&#x27;re endangering people and property while dead sober, you get arrested anyway.  Why does the content of their blood fundamentally matter?<p>If someone is swerving around and kills me, why should I care if he was drunk, stoned, or just not paying attention?  I&#x27;m just as dead.  Its not like I&#x27;m any less dead if he was stoned or more dead if he was drunk.<p>Remember its not 1930s era prohibition anymore.  Plenty of video recorders, cheap.<p>I&#x27;m willing to trade &quot;arrest stoners who haven&#x27;t crashed yet&quot; for &quot;also arrest dead sober idiots who can&#x27;t drive&quot;<p>I&#x27;m just not seeing a problem.  Other than the criminal justice system, who benefits by DUI laws?  Clearly the general public isn&#x27;t any safer because dangerous driving is already illegal via the negligence law.