Does this automatically lead back to total prohibition of any mind-altering substance, since you might be a threat to someone under the influence? It's easy to

Does this automatically lead back to total prohibition of any mind-altering substance, since you might be a threat to someone under the influence? It's easy to argue 'no' there, because the key word is "might." In those other examples, your action is putting them in direct danger. If you take drugs, you still need to take further unrelated action to endanger others. You still need to get behind the wheel or pick up a gun. The drugs in your system aren't going to hurt someone, and it's purely a matter of mind-reading to assume that you "might" decide to hurt someone because you're on drugs. If we want to go down that route, we can just plug all our data into Google Judge and let it statistically decide who should be sent off to prison based on the likelihood that we might harm someone in the future.