"I invite you to visit the Bryce forum at 3D Commune. There's a sad fellow in his 40s there who is chronicling his recently diagnosed lung cancer." Sounds fun. I must get along to 3DC. I personally hate breathing in smoke from inconsiderate twats who think that just because they're killing themselves they can try to kill me too. But there's a world of difference between reality and a graphic of a some improbable lady with a cig between her jaggy lips. As has been mentioned, if you ban this then you'd ban 30% of stuff in the galleries, much of which represents deeds significantly more harmful than smoking.