But what's the logic? I have never seen it but it doesn't sound good even aesthetically (which is usually the justification for all kinds of violations of common sense). So what are they thinking?
A number of hotels that were built with this lack of privacy (including one I love - but its been fixed there though - more subtle worse as you could see in from the stairs) were all designed by the same architect who is said to have had a kink about looking into toilets.
Maybe he started it, and as his hotels are (otherwise) lovely it made it part of a cool aesthetic and was therefore copied?