What does "crime land" mean here? Is it kind of a metaphor?
The speaker has used "crime land" here to roughly mean the area of activity considered to be criminal. Thus, we can understand him as meaning that marijuana should be taken out of the area considered to be illegal activity, and legalized instead. It's not a general term but manages to express the speaker's ideas effectively. Ex: Marijuana is still considered part of crime land in New Zealand. Ex: Take marijuana out of crime land.