I know what happened, yeah. My guess was, they were testing the system, and they used an obviously fake alert just in case somebody screwed up and distributed it for real. Which is what happened, so everybody should just have a big laugh over this and make sure it doesn’t happen again.
It is also pretty solid Esoterrorist fodder. This is the sort of thing you’d have distributed if there was some kind of rampaging miniature construct running around Texas until a shadowy government agency managed to take it out; anybody who’d try to reveal the truth later would just get pointed to this and told Can’t believe everything you read on the Internet, dude. The term for this in the Esoterrorists RPG is the ‘veil-out,’ and it’s an integral part of the game.
Alternatively, it would also be about right for a superhero universe where these sorts of things were openly acknowledged and taken for granted. ^_^