I don't see the societal difference between them. Eventually, weed will be legalized or at least de-criminalized.
In my view, it is not the role of government to protect us from ourselves. If one chooses to get high through alcohol or weed, so be it. Now if they do something irresponsible afterwards (such as drive), then the government should protect society from them.
well...you make a good point...but what about the parents that neglect/abuse their own children because of it...I wouldn't call that society...that is in the home where children are supposed to be safe...