A listener writes in response to the Classic episode on legal drugs. A caller relates a story about drones built to look like birds. The guys dive into the concept of the iron law of prohibition. All this and more in this week's listener mail. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com They don't want you to read our book.: https://static.macmillan.com/static/fib/stuff-you-should-read/ See omnystudio.com/listener for privacy information.