I think it’s cool. And it forces them to keep them clean.
For those worried about being “seen” I don’t think it’s a problem. The “natural” state of the plastic/glass material is probably opaque. When voltage is applied, the composition changes and it becomes translucent. When a person is inside and the door is locked, the voltage is off, so the glass is opaque, and the user is not visible. Upon unlocking the door and leaving, voltage is applied, and the interior becomes visible so the next person can see that it is vacant and available for use. Simple.