So, according to Beck's logic, if I were to be playing an MMO, and asked for a quick break so I could 'take a dump', but during that same time a robber broke into my house and stabbed me to death, that that's a code for "I gotta dump some important data for the CIA"?
First off - Beck has no proof that he called (or more importantly didn't call) the White House or the Pentagon. None of the story says The White House was like "hurrr durrrr we didn't know".
Second off - You can do BOTH at the same time. Ever hear of a laptop? A cell phone? A landline? Any of those ringing a bell? I don't see why, in that situation, you wouldn't tell your friends that your life was in danger, especially if you're in a situation where you can't do anything else. Going to the White Houses website isn't going to stop an insurgency, calling Obama won't make them go "Oh shit, this guy means business." And its an embassy - outside of guards, I don't think their sitting on a rich cache of weapons.
Third off - Wouldnt the CIA use a more structured mode of communication than EVE online? Correct me if I'm wrong, but relying on something that can have its server breached or taken offline kinda makes it a bad idea to rely on. Most forms of communication have a back up, usually satelitte, incase communcations are severed. And that Eve message was either private or public. If it was Private, why did the CIA leak it? If its public, why is the CIA relying on that? Even if you're talking in code, sending it through something people can intercept and decypher is a very clear disadvantage - especially if your covering up something big.
And fourth - do you really think that people who play Eve wouldn't be able to decode the messages? These are fucking Eve players - its a game that is known for its tedium and its appeal to very smart people. Its essentially spreadsheets. If ANY gamer community were able to decode messages, it'd be them.