Unfortunately, a lot of recreational-Marijuana users are too drugged up/lazy/poor to do anything about it.
The consequences of drug addiction.
Marijuana may not be extremely addictive if consumed in moderation, but there is the danger of becomming addicted. Also, think of this. When was the first time you had a taste of alcohol? 6? 9? Legalization of marijuana will result in young kids being around the substance, as they are around alcohol. Once marijuana is in the house and Daddy is smoking it outside, they'll grab a mouthful and see what it is.
For all those who say there is no danger, and that it is good for you, research a little more. For those that say it is good for gaining happiness, try finding real happiness in life that lasts a lifetime and comes without side effects but with happy memories, not just lasting a few hours. For those that say legalization will be good for the economy, I do not want our President and all the CEOs of major companies smoking marijuana and showing up to work high. For those that want it more available, it's already plenty available, just go down to a Medical Marijuana doctor in Venice Beach or something and he'll hit you up.