My thoughts are this:
People are going to smoke pot regardless and you're not going to be able to stop them because you CANNOT legislate morality and tell people what is right and wrong. If you need any further proof of this then look at how much money the government spends on prosecuting those who grow, sell and distribute it. This is the same principle behind Prohibition in the 20's and the same reason why it failed is because the government realized that it was a massive fail and the more they tried to prevent people from partaking in it then the more they did it. Granted I don't live in California but I can see the benefits of legalizing it and I fully support it as it would solve a lot of their budget and funding issues within their state but the problem is getting the hardcore Conservatives to agree.