Nevada is known for gambling, 24-hour liquor sales and legal prostitution. Yet the main group opposing Question 7, an initiative on the state's ballot next month that would allow the sale and possession of up to an ounce of marijuana by adults 21 or older, is called the Committee to Keep Nevada Respectable. In Colorado, opponents of Amendment 44, which would eliminate penalties for adults possessing an ounce or less of marijuana, are equally certain of their own rectitude. "Those who want to legalize drugs weaken our collective struggle against this scourge," declares the Colorado Drug Investigators Association. "Like a...