I've never been one to believe that laws are around to "protect" people. I don't feel "protected" by laws, why should I? There's nothing enforcing that law to be carried out by people.
For example, I go to the bank a few days ago and right there, bu the door, there's a "No Guns" sign and it makes me wonder if that sign is really stopping anyone from bringing in a gun? Is a would-be bank-robber really going to be stymied by that sign?
I see most laws as the same thing is the only thing stopping you from killing your rival are laws? Is the only thing stopping you from stealing a car are laws? No.
Laws, IMHO, in my opinion aren't in place to protect people or to stop crime to simply make it possible have a means to prosecute people for stepping out of the bounds of society. So if someone does kill or steal we can say, "Well, you knew it is illegal so now we have a set of consequences to lay upon you."
So now we have to look at which things are the biggest problems in society and what laws we need to lay out punishment for them. Obviously stealing and murder are big problems so we lay out a means to get them off the streets but how much is society harmed by having a marijuana-dealer out there? Selling some dried-up, crumbled up weed he grew in a hydroponic garden in his tool shed? A drug that makes people a little silly for fifteen minutes. Is society harmed that much by this being out there?
Is it harmed that much more than how society is harmed by alcohol or by tobacco? Products that rack up thousands of primary and secondary deaths every year while marijuana's use has never been directly linked to any death. I imagine it's possible "someone got high and dove off a building or into a tree or something" deaths have occurred but no one has died directly from smoking weed. Plenty of people have died or had serious health effects from smoking cigarettes and from abuse of alcohol.
Would society be harmed by marijuana's legalization? It was legal in this country for a while in the early part of last century, it's "decriminalized" in other countries and legal in still others and somehow those various places have not seen a collapse of their infrastructure by being filled with stoners laughing at Wugsy cartoons. The marijuana debate in this country is dominated by a strong-anti extreme as the best way to be against something is to try and sell the worst possible scenario and scary situations will always scare people more than good ones.
The pro-legalization side has it's extreme too but there's nothing "scary" about it to the point to motivate people to be for it. "People will be high all of the time and society will collapse!" motivates people more than "Harmless and kills no-one."
I see it sort-of like the DADT debate that raged last year where those in favor of the repeal, allowing homosexuals to serve openly in America's military, were saying "Yeah, they're people. We're a free country, why aren't we doing this?" but the anti-repeal people were saying "Troop morale will be destroyed! Butt-sex rape in boot camp! "How much will you trust that guy to save you if he's checking you out while in a battle situation?!" Stuff like that that argument was mostly dominated by the extreme anti-crowd. Even when we point out other countries doing it, like Canada, that far anti-extreme still dominated the argument. Thankfully a Liberal-controlled Congress and a Liberal president weren't scared by that extreme.
So, again, I'm just left to wonder why it's illegal when the stuff is Mostly Harmless?