John,
I have quit both smoking and snuff, and remember the dip as being more difficult to stop using. As the article you posted stated, nicotine in this form provides quite a jolt.
I have mentioned in previous posts that I had to get gum grafts. Apparently in some parts of the U.S. this is a semi-common occurance. My dentist has done this procedure many times before. IT REALLY HURT!!! He cut some of the skin off the roof of my mouth and sewed it to the gum area below my bottom front teeth. Before I went through this procedure, I noticed that everyone walking out of his office, through the waiting room, looked unhappy. Yeah, the procedure really hurt.
Living in another (more politically correct?) state now, whenever a hygenist asks about my gums, I tell them what happened and they look at me like I'm crazy. Gee. ya think? Well little do they know it was even worse; parts of my bottom gums had turned white, a pre-cancerous sign.
Do I need to say how my wife felt about Copenhagen? No, I think not. It was so bad, I would go to sleep with a pinch in; when I woke up it was gone. My wife's grandfather used to do the same thing. The stories I could tell you would make you sick.
BTW, I think its great you posted photos of people who had to have their chin/jaw removed. Seeing someone like that in person motivated me to stop dipping. Hopefully more people who dip will see images like this. Removal of a dipper's chin is, unfortunately, more common than most people think.
I wish that I never put nicotine into my body. But I can't change that. I can, however, choose to never do it again. One day at a time.
Glen