China's PLA video - accidental or a strategic showing of their hand?

It's being called the "smoking mouse" already. This state sponsored propaganda video archived on F-Secure's blog site has already been removed from the PLA's site (or at least been edited to remove the images of the PLA hacking tool). It clearly shows that the tool is from the People's Liberation Army Information Engineering University, so the obvious conclusion is that China has been outright lying (*gasp*) to the rest of the world when denying any involvement and/or sponsorship of the gaggle of recent cyber-crime incidents. But was it truly accidental? China has a history of flaunting their espionage feats in the face of the U.S. (David Wise's book on U.S./China espionage Tiger Trap is excellent), so one has to wonder if it may have been another event in a long line of examples of China showing their adversaries one of the cards in their hand to remind everyone that they still have assets that the rest of the world should worry about. That it would be unwise to ignore their capabilities. Which is absolutely true. It just seems a little childish if this were the case.