Last week, the grassroots organization People United for Medical Marijuana filed a petition to allow medical marijuana for seriously ill patients in Florida. The petition proposes an amendment to the Florida Constitution that would permit the cultivation, purchase, and use of marijuana to treat a number of specified and severe diseases, including cancer, AIDS, and Crohn’s disease. Petition-gatherers will need to collect 683, 149 signatures from registered voters in order to make it onto next year’s…