Should #Lean Conferences Add a "Code of Conduct" for Speakers and Attendees?

In today's post, I pose a question: Should the major Lean conferences adopt or adapt a practice that's now common at tech events, including Agile and Lean Startup events: a "Code of Conduct" for participants and attendees. Is this a countermeasure to a problem that doesn't exist in the Lean community? Or, is it still good to proactively encourage people to speak up to conference organizers if they are subject to bad behavior during the event? In this post, I get feedback and thoughts from the Lean Enterprise Institute, AME, Catalysis, Lean Frontiers, and the Shingo Institute.