Here is what I think. There are good arguements for both sides. All the cliche excuses. Marijuana hasn't killed anyone. Marijuana isn't addicting (yeah right). On the other hand... Marijuana is a gateway drug. Marijuana is worse than smoking cigarettes.
When it comes down to it, what you need to ask yourself is it really probable that marijuana is going to be legalized. I believe the answer is no. Why legalize something that can only do harm to our society and our children. We couldn't even legalize gay marriage, how are we going to legalize weed. Why not spend time on something more effective than legalizing drugs?
Now you may be asking yourself why don't we make alcohol illegal. That's a cute idea, but it doesn't work as the past has shown.
If you really want to smoke it you can. Why not just got smoke yourself to retardation, and stop trying to corrupt society further.