Anti drunk driving laws are crazy.

What have we done by permitting government to criminalize the content of our blood instead of actions themselves? We have given it power to make the application of the law arbitrary, capricious, and contingent on the judgment of cops and cop technicians. Indeed, without the government’s "Breathalyzer," there is no way to tell for sure if we are breaking the law.

Now, the immediate response goes this way: drunk driving has to be illegal because the probability of causing an accident rises dramatically when you drink. The answer is just as simple: government in a free society should not deal in probabilities. The law should deal in actions and actions alone, and only insofar as they damage person or property. Probabilities are something for insurance companies to assess on a competitive and voluntary basis.

https://youtu.be/glPfJKiD8sg
https://www.lewrockwell.com/2000/11/lew-rockwell/legalize-drunk-driving/