Break out the tin foil hats, folks!
"It’d be a particularly stupid or incredibly ballsy terrorist to try and use something like WoW, but there’s all manner of MMOs out there and that the NSA probably wasn't monitoring. Even worse, there are undoubtedly people out there who will get it in their head to troll the NSA.
For a thoroughly paranoid NSA analyst, how do you know that in-game message full of weird characters isn't intel being passed between terrorist cells? To us, it might be a badly formatted gold farming message, or it could be somebody trolling the goons at the NSA. I do not believe the NSA is constitutionally or institutionally capable of looking at something and not thinking, “Yup, terrorists.” Not anymore. It’s perfect."