Ok. When someone actually has some concrete information that would indicate North Korea has the capability to "attack and permanently damage large portions of infrastructure", anything equivalent to Stuxnet, or an intelligence service capable of delivering such threats to critical infrastructure, I'll worry about that then.

I just think their conventional military, their continually improving nuclear program, and their ballistic missile technology are a lot more real and a lot more dangerous than the cyber-pocaylpse people have been trying to scare everyone with since the nineties.