Quitting anything can be very difficult regardless of whether there are physical WD symptoms or not. The psychological aspect is what causes most people to relapse on ANY substance, but of course everyone is different. Personally I've never been able to quit cigarettes for as long as other substances including alcohol, meth, various strong opiates. Much of it has to do with how socially acceptable something is, I would think. Smoking is frowned upon, sure.. But not like IV drug use.
If you defend what you perceive to be right and offend what you perceive to be wrong you are called an extremist or a terrorist. Did you know that Nelson Mandela was declared terrorist #1 by his government before being imprisoned, and upon his release was awarded the nobel prize for peace by another government? What is right and wrong, who can decide, and when this Earth will disappear, who will be left to judge?
The smoking controversy is the typical apartment door paradox. If you install a weak door with a Dollarama 10$ lock on it, robbers may break in and kill you. If you install a steel door with a 500$ lock no one can open, no one but yourself will be able to get into your apartment, including the emergency ambulance services if you get a heart attack and become immobilized. So the question is, which door increases your life expectancy?
You see, smoking causes cancer but stress also causes cancer, and smoking relieves stress. So when a stressed individual starts smoking, is he increasing or decreasing his chances to get cancer? The cancer society, without any comparative research, analysis, investigation nor publication was able to "solve" the apartment door paradox when it comes to smoking saying that smoking will increase your chances to get cancer. Just like that...pooof...they must be star readers! Where are they taking that, by reading in the stars?
Remember the definition of an idiot (stupid person), is a person who knows. And if you ask, he might even explain it to you. And if you don't understand you're "stupid". You have to get used to the idea that people who criticize drug use are idiots and will die that way.
Also make the difference between being stupid and ignorant. Ignorance can be cured with knowledge, stupidity cannot. After reading 100 books, you might be well read, you might become competent in several domains, you might earn a skill or two at your job, but at the end of the day, you no less of an idiot than you were at the beginning. Trying to inform people who hate drug users and give them knowledge is useless. They are born idiots and will die as such.