The hacker doesn't understand what they're getting themselves into, especially bragging about it. The hard part about going up against an entire nation/state is that it's relentless. The state never gets tired and never runs out of money, they could setup a team of people to 'work' on that individual and also potentially his present and future family members for a very long time. They can keep replenishing their team…
who know if NK will do it again, but showing his identity so that NK know who they should target is really stupid