[kubb]

You mean horizontal, at the bottom of the door. That one can be justified by ease of cleaning.

I mean vertical at the side of the door. You can literally make eye contact with the occupant as you walk by.

[mulmen]

Oh. You'll be relieved to know my office stalls are constructed in a way that the panels overlap those gaps. You're right it isn't hard, basically the door just opens in and is wider than the opening. There's no way to see in or out.