It would be easy reconfigure a lav on a wide-body as a smoking area without forcing non-smokers to ingest the second-hand smoke. Seating could be assigned as "smoking access" around the lav so the whiff of smoke as the door is opened and closed would not be offensive to those in the vicinity. About 25% of adults still smoke, ergo 25% of our customers are smokers. Why do we subject them to the stress that results in air rage incidents on long-haul flights? I don't defend the perpetrators in any way - throw the book at 'em. But I support the right to smoke, and would like to see access on flights of some duration, say 4 hours or more. To deny it based on the danger of a lit object isn't credible since it was allowed for decades and nobody knows of an accident caused by a smoker-triggered fire.