The smell from smoking is terrible. Not only does it make a person smell bad outside, it also makes the inside of his body smells bad. Bodhisattvas and Dharma-protecting good spirits will not want to protect you when they find out you smell like smoke. No matter how much merit and virtue you may have, they will leave you alone and many accidents will happen to you.
We don't have to talk about others; currently there is one person among us who smoked stealthily and caused a very dangerous incident to occur. It happened because he was smoking, but he still doesn't realize it.
People who smoke will fall into the hell of Flames after they die. The hell of Flames is especially prepared for smokers. Whoever likes to smoke has the chance to go down there. If you refrain from smoking, you will avoid the path that leads to the hell of Flames. If you don't, however, you may end up there in the future. People do not know the seriousness of such matters and do whatever they like. When you understand, you will not do it. Smoking is a more severe problem than drinking.