Indeed, for many the pipe is a vocation. I suppose a hobby could become an obsession and, if kept under some semblance of control still be a hobby.
The more I read here the more I find myself moderating my thinking. I am now at the place where I except the idea that person who smokes one or two pipes or less a day, simply as a diversion or a reward, may be classified a hobbyist. Whereas, one who smokes throughout the day is simply a pipe smoker. A person who collects, but does not smoke, pipes is certainly a hobbyist. I do not think they would be referred to "pipers" in our understanding of the word, though they are certainly pipe enthusiasts and hobbyists.
Now, someone who smokes all day and also delves into origins of pipes, blend characteristics, investigates different manufacturers, collects pipes, basically does more than simply smoking a pipe, has combined his hobby with his addiction and is referred to as . . . God only knows what! Which I believe many members would qualify to be referred to as . . . (we need a term). "Pipe Smoking Hobbyist" is too much of a mouthful I think. PSH?
My conclusion is that unless one sells pipes and/or tobaccos as a vocation, or only smokes as an addiction then "hobbyist" is an acceptable sobriquet. Now the question becomes should there be a special term for the "smoker hobbyist" so as to keep misunderstandings to a minimum. Should smoker/hobbyists be required to wear certain clothing or jewelry so as to easily be identified in bars or such ( a not particularly arcane reference to another thread.)?