I think it's important to make it fun. If you have competitions, turn things into games, then it makes it more interesting and entertaining. I teach ESL and am often asked to do listen and repeat drills with the students. Just doing the sentences normally bores the students (and, more importantly, me!) out of their skulls. But changing things up, doing it in silly voices for example, makes it more entertaining.
There's one like this in Yokohama, Japan. The mens urinals are lined up against the side, with a floor-to-ceiling window looking out over a busy plaza. And it's only on the 4th or 5th floor, I believe.
In some ways, yes. On the other hand, what about someone who uses ebonics (African American Vernacular English)? The instructions are just as complex as Standard American English, but someone using ebonics would fail (probably -- I don't know enough about the grammar differences).
http://boingboing.net/2005/08/26/vaginacan-and-other.html