LOL, what a theme. for the very few here who earn their money sitting in the cockpit its abvious and not a discussion worth that a short nap is a nice thing on longer flights ,especially at night- surely not on short final, but at cruise when the other guy is awake .
the gents in this thread who are disgusted make clear that they never had to live from earning money by commercial flying and so never had an inside view how pilots life really looks like. you will not find this in regulations, you will not find this in simulation flying or just being an aviation fan.
best regards