cease cigarette cigarettes danger death die disease forbidden kill kills lung lungs nicotine no smoking quit risk sign smoke smoking stop tobacco ban banned cigar health prohibit roadsign smokers stop tobacco no smoke cease smoking quit smoking roadsigns signs abuse addict addicted addiction addictive ailment bad barrel cancer cancerous cannon carcinogen caution concept conceptual dangerous deadly drug fatal free habit image isolate isolated isolation lethal medical object photo photograph picture poison poisonous resource smoker stock unhealthy vice warning weapon white