ban banned cease cigar cigarette cigarettes danger death die disease forbidden health kill kills lung lungs nicotine no smoking prohibit quit risk roadsign roadsigns sign signs smoke smokers smoking stop stop tobacco tobacco blue clouds red san diego sky stop sign warning words activism bicycling biking cars driving graffiti road signs stop signs traffic against anti-war demonstration no peace protest resist war bus bus-stop city communication long rails road street trailer transport transportation battered command compulsory debar directive grunge grungy metal prevent prohibition nature train angle dark night shape caution copyspace yellow go green light