All I've gotta say is authoritarianism rarely begets obedience...but often creates obfuscation. As a high school teacher I have heard many, many stories from teens about what they successfully hide from their parents. I find it so very sad that a parent would feel entitled to random authority over a teen simply because "my house my rules". Its not just your house, but the house of all who live there. To see it otherwise is not really respecting your kids.
Open dialogue is always much more powerful than a line drawn in the sand. Showing your kids you respect them as responsible adults is even better.
And while we are on this topic, are we all obligated to follow laws we don't agree with (and had no part in creating) simply because they are laws? Should I not seek a homebirth in a state where it is illegal for example? Anti-marijuana laws were historically created for the benefit of corporations (cough*DuPont*cough) and because of racist fears of "co-mingling". Both silly reasons. So using the "its illegal" argument holds no water IMO.
California is on the path to legalizing recreational marijuana. If they do they are going to make bank, and all the other states are going to be jealous lol!