I'll copy and paste a post I made about other issues with weed legalization:

- Harder to avoid the Government in marijuana trade. Before, if you wanted to buy some weed, you just had to ignore the Government. This is going to become a much harder practice, now that much of the supply will be controlled by the state.

 - It gives cops another reason to search you. These laws do not allow for unlimited weed, they specify certain amounts. Before a cop would stop you before, they had to have some suspicion (taken with a pinch of salt). Now, you're smoking a joint in public, and its legal, but could that be grounds for a search? In case you have more than your allocated amount? Someone obviously possessing some weed is far more likely to hold over the legal limit than somebody who isn't obviously possessing any weed... will that develop into "grounds for reasonable suspicion"?

 - It could turn irregular interstate checkpoints into regular or even permenant warrantless-search bases. Would you even be able to leave Colorado or Washington without going through a TSA checkpoint? All surrounding states will comply with federal law, and continue the complete ban on marijuana, and the Feds are going to want to "penalize" these two states as much as possible.

- It gives the state more of your money. Obviously, marijuana is going to be highly taxed (I believe the Washington bill has a 25% tax at manufacturer, wholesale, and retail), and that money's just going to go into welfare programs and enforcing all those unjust laws.

Any other problems that I've missed?

For real? The stuff you learn while reading forums, it's magnificent.

Actually according to research the biggest loser of money is likely the north eastern mexican drug cartels.

I don't expect big pharma to be hurt too much...

Weed is neat and all as a pain reducer.   Most big pharma pain pills though are more on the order of freaking heroin.

Local gangs will be hurt, but they'll just move into pain pills more, and postitution and the like.

Even JUST being in colorado will be a BIG hit to the drug cartels... because what people are overlooking is well....  People are just going to grow pot their "legally" (still federally illegal) and of better quality then the cartels... then they are going to sell it to people who are going to transport it over state lines.

Maps a little smushed, but you get the idea...

it sucks.  Maybe some laws passed somewhere yesterday in regards to this?  Don't know.

Seems pretty comprehensive. I guess I'd only add the fact that onerous regulations and a minimum age requirement to purchase will keep the black market around. That whole "Regulate my weed!" way of framing the argument really makes my skin crawl. Can't even stoners stop fellating the government for two goddamned seconds?

Coming from a country (Australia)  that recently denied gays/lesbians the right to marry  again, I can't say I'm in the strongest position to judge other countries laws, but that honestly is just too dumb and ridicilious for my comphrehension!

Makes me wonder how many more years until shit in the world actually makes sense and is fair. :/

This does not make it legal to smoke weed in public does it?

I'd really like to see how this turns out. Coming from a country that did all the groundwork, I'm still not entirely sure whether this is a good thing.
The weed over here can be classified as a hard drug. We are really good at growing the damn stuff.

As a fellow Australian, that shit was a disgrace. What we need to do is kick out all those bigoted old farts with their obsolete politics who make up the vast bulk of the  government.

Couldn't agree more mate, I think it's an absolute joke that our country/continent that has actually moved with the times is still being governed by obsolute politicians with decades old views that simply don't match up with the demands and wishes of it's citizens anymore, they are holding us back, and they really need to go.

Sure, but in general it's not a good idea to start doing any drug, no matter if it's cannabis, heroin, alcohol, tobacco or whatever.

I have so often heard people who were against legalization because they seemed to believe that by legalizing a drug like cannabis, the government kind of claims that this drug is perfectly safe and unproblematic. In my opinion, that's a big misundertanding: Legalizing drugs is not a seal of harmlessness for that drug; instead it simply illustrates the insight that drugs don't disappear just because they are forbidden, and that the problems surrounding this drug can be better dealt with if the people consuming it are not criminalized.