Is Nicotine an Alternative Vice and Should We Prohibit it's Use?

A colleague of mine shared that she had met a man who had quit spit tobacco by switching to nicotine gum. He uses 3 or 4 pieces at a time. He was happy that he quit spit and had no desire to stop using the gum. She wondered what she could say to him about his addiction to nicotine gum. Other colleagues gave her suggestions as to how to get the NRT user to change his behavior but no one really