At a former airline i used to work for in the late 80' s we had a captain who insisted on not being disturbed on night flights (ie no visits - poor FO ) , as he would always sleep - all sector .
Even on a LGW-PMI. (2 hours).
He had a long drive in from the west country, and i guess thats the reason he always demanded this.
However, 3 years on , sadly we were all informed that he had died instantly in a night time motorway crash .
He was obviously having the best of both worlds in his own mind, but also made his fo's suffer because of it (as nobody was allowed in the flight deck) , and then surely paid the highest price himself.....