That car with the tinted windows in the street outside your house contains agents come to arrest you for alerting the last seven people in the world previously unaware to the codes you so blatantly published.
At least that would be exciting. Someone probably erroneously told me once that there are certain 'trigger' words in e-mails that set the MI5 mob wetting their pants. A friend and I sent each other e-mails along the lines of 'There are heroin packets in the bombs aboard the aircraft.'
You guessed, nothing happened. Another urban myth. I did so want to be interrogated and claim my compo after I'd written the book.