@lnxw48a1
At last $EMPLOYER, even when I had an office, I got the most work done in the first two or so hours before everybody got in and started bothering me.

Even a Do Not Disturb sign on the now closed door (it was something to the effect of "unless the building is on fire, don't bother me"), signed by the owner, would keep people from bothering me because "It's only one question"...