Yes. Choice on this matter should be legalized. Antisocial activity is what should be illegal. There is nothing antisocial about a person choosing in their own privacy or out in the open air to smoke pot. It doesn't hurt other people.

Antisocial activity is activity that hurts other people in some way, damages their property or impinges upon their freedom. Smoking pot does none of the above. Driving stoned might cause a problem...accordingly, don't prohibit the smoking of pot, prohibit driving under the influence. Same basic approach as with alcohol.

If you wish to protect people against themselves...then you would have to also outlaw laziness, willful ignorance, overeating, sleeping too much, staying up too late, being promiscuous, wasting valuable time doing valueless things, etc...

And it would be very silly, wouldn't it? And effectively unenforcable on a broad basis...just like the silly antimarijuana legislation is. You don't have the right to legally force other people to be like you, just because you think you are better than they are in some way.