Doubtful. If it did it wouldn't be much increase. I don;t know anyone who chooses NOT to indulge that would change their mind based on it becoming legal. You either enjoy it and chose to or you don't. People that don't, simply do not enjoy it, or they are handicaped by judgemental values handed down by parents with the angle you seem to be comming from. I know lots of people who like it but refuse or are reluctant to smoke it because they are afraid of what others will think of them. Insecurity, basically.