A reader writes:
The blogger you linked to missed the more noteworthy story, which is that all of North Korea actually watched the match you mentioned live on television. This unprecedented event was likely inspired by the team's fairly good performance against Brazil in the previous game, which they only lost by one goal - a "victory" for them in the same way that a tie against the UK was a victory for the US team.
This is actually quite an amazing story. For a nation that is used to having all of its news censored, and only hearing good stories about the country and the dear leader, to be watching as its team gets wiped out by Portugal 7-0 is a rare dose of reality.
And maybe they miscalculated the risk: North Korea had a much better showing the last time they played Portugal.