Out of curiosity, how strictly do you guys adhere to the coach can't leave the box to sit on the bench?
Would you rule that the coach has terminated the right to use the box in any of the following scenarios:
The coach goes to the end of the bench (not within the box) and sits down to speak briefly with an injured player that is receiving medical treatment/attention. The coach returns to the box after assessing the players injury and ability to return to the game.
The coach leaves the box to retrieve a dry-erase marker, pen or some other item that he/she dropped (don't read this as threw in anger, because throwing stuff like a child should result in a TF and the box is gone anyway) or to retrieve some other item (jacket, clipboard, roster, etc) that is not within the coaching box.
No portion of the bench area overlaps the area designated for the coaching box. The coach goes to the bench and sits down for a brief period to rest, get a drink or speak with a player and remains on the bench for (a) while 2 FTs are attempted by either team (b) during an entire possession on either end of the court (c) for multiple possessions (d) during a timeout or between periods or (e) the duration of an entire period.
I ask because I've never seen any official treat the coaching box like it is a magical island that once it is left it can't be found again, but the rule book seemingly wants it to be treated that way. On another note, I've seen the coaching box marked as an entirely solid area contrasting in color with the sideline. Would anyone object to such a method of marking the coaching box?