I was once on a dive boat that only had 4 divers--me, my buddy, a very famous diver/instructor, and his student. That very famous diver/instructor was, of course, well known to me, both by his reputation and his past participation on ScubaBoard. He did not know me, but if he had known my ScubaBoard name, he would certainly have recalled a recent discussion in which our beliefs had clashed. I did not introduce myself, and he did not ask.
Before we left the dock, he had to make a minor repair on his student's gear, and it called for some flame. He asked if anyone had anything that would work. I went to my kit and produced my lighter. He asked why on Earth I would carry a lighter on a dive boat--was I a smoker? (He evidently meant by that question that only a really hooked smoker would bring his smoking materials on a dive boat where smoking was not allowed.) I said, no, it's just a normal part of the kit I bring to dives. I did not say that I make sure I always have a pretty full kit when I am working with a student, and I was surprised he did not have one.