In the 70s a british airtours 707 suffered a major toilet fire due to passenger putting ciggie in paper bin .. Major problem crew have is unless they catch the person smoking the police are powerless, the fact they smell of smoke is not a good enough reason . Where as i am a smoker i perfer to operate as we do now and ban smoking on flights . I have been flying over 20 years and well remember the smoking days of flying . thankfully the days of nicotine brown condensation dripping from the cabin ceiling, of an a/c whose aircon was working over time trying to keep the a/c cool, whilst on the ground are long gone . as regards air rage don't think this can be laid at the door of no smoking many factors conribute . booze ,drugs, leg room ,delays take your pick !