Rocinante: Good thing you live in California...you can second-hand smoke marijuana legally [but only for second-hand medicinal purposes.]

Never been to spain yet, but I think the government together with the tobacco manufacturers should take the initiative to educate, inform these thick-conscience smokers thru massive campaigns and Ads,that not only it's bad for their health but are also endangering the non-smokers around them especially in an enclosed public places and transport.