Originally Posted by
orbitmic
But that's the thing. To me, none of the above is "common sense" even in cases where I would personally reach the same conclusion as you when it comes to my own behaviour.
Common sense is subjective and comes down to a test of reasonableness. Different people will probably make slightly different choices regarding minutae (pens in hotels) but most will probably agree about the important stuff (reusable items from airlines*).
*I exclude BA F pajamas from this list.