Be sure to take a Radon detector with you in that hole
Just kidding.
Just my humble opinion only, but I look at all of this as a risk vs. convenience balance. And to your point, if we went totally extreme on this, we wouldn't even take our rigs on the road for safety reasons.
Each has to decide for himself, how much risk he is willing to take for himself and his family. It's when those risks start affecting others that it really gets to a point where we all care about decisions others have made.
For the record, I drive with the propane on. I began doing this out of ignorance and continued doing so for the convenience of the refer being on. As I get older, wiser (questionable), more learned on RVing and rub elbows with all of you who are wiser than me on RVing, I have changed some of my ways and may even later consider turning off the propane.
I think this is all good discussion, regardless of how I do it vs. the next guy.
Keep on discussing...
Jim