See also related threads, from January and February, in which Decius observed:

One must assume that all garbage is monitored by the state. Anything less would be a pre-911 mentality.

Perhaps, but nevertheless these disks successfully made their way to Africa.

In such circumstances things rapidly descend into the classic cryptanalytic exploitation dilemma, where you are faced with deciding whether to prevent some adverse event at the expense of revealing yourself or allowing the event to occur unimpeded, accepting the negative outcome in the expectation that something even worse may come along later, or that other benefits outweigh the occasional downside.

From a review of Neal Stephenson's Cryptonomicon:

The Waterhouses, Lawrence and his grandson Randy, are at the core of a novel which constantly shifts between World War II and the present. Lawrence is a key player in the crypto project that broke the German and Japanese military codes. Not only are the Allies privy to General Rommel and Admiral Yamamoto's every directive, they are continually faced with the moral dilemma of whether or not to act upon their hacked knowledge, thereby risking disclosure.

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