Clay Conrad has a very well written op-ed on jury nullification and the legalization of marijuana. The premise of Conrad's argument is that through jury nullification citizens can informally legalize marijuana by acquitting those charged with low levels of possession. Conrad, a practicing attorney and author of Jury Nullification: The Evolution of a Doctrine, has written extensively on the topic of nullification.
According to the article,
Jurors have the prerogative to take a broader view of their jobs, one more in line with the history and purpose of the institution of trial by jury. Jurors can take an active role in the administration of justice and apply that “warm, living public opinion” to determine whether to label one of their neighbors a criminal. In doing so, they just might save a morally innocent (albeit technically guilty) individual from an unjust conviction and save our prisons, probation officers and social workers the expense of dealing with one more unnecessarily shattered life.