A new numerical coinage has arisen in the last few years (especially in Silicon Valley) to describe something similar. Instead of banned, it means, roughly, "unavailable," or, "out of the office."

The term?
404, as in, "I'm sorry, Mr. Bezos is four-oh-four at the moment."

The source? Well, it can be found at any one of a number of places, but one good place to look follows:

http://www.derrida.com/anu.html or,
http://www.derrida.com/wordsmith.html, or many -MANY- other places.

Cheers.

Jon