[extropy-chat] codes in scam letters

[spike]

After all this time, I am *still* getting scam letters,
the ones that go something like: Greetings sir or madam,
I have heard from numerous sources that you are an honest
man or woman, so please give me your bank account number
and name, that I may give you 38 billion dollars stolen
from nygerian communist insurgents, etc.

(I actually got one that misspelled the country it was
from.  {8^D  )

Of course, no one old enough to actually have a bank
account is falling for those gags anymore, but it 
occurred to me that they would be the perfect vehicle
for broadcasting coded messages to sleeper cells or other
criminal gangs.  No one actually reads very far past
any email that starts with the word "greetings" so
this might be just the thing.  They could even hide
a message in misspelled words, so that a copy-
paste into microsloth word would underline in red
squigglies the actual message.

Harvey and other security wonks, has this been done?

spike