The only way North Korea does anything stupid is if there is some real domestic threat to the leadership. The probability that the DPRK will launch a major attack is virtually nil.
lil’ kim may just feel his back is against the wall and he has no way to go and nothing to lose. To a man like him losing the spot as Dictator/God for life, he rather be dead. As as someone else pointed out in this thread the Kim's have been ruthless and get rid of an opposition down to the the guy's neighbor's brother-in-law. Kim is the kind of person that this quote from the movie 'The Dark Knight' is about: Some men aren't looking for anything logical, like money. They can't be bought,bullied, reasoned or negotiated with. Some men just want to watch the world burn... Especially if they can get into the history books as the one that started the fire.
I believe that you nailed it! That's the only way any of this makes sense. This has all the earmarks of a Hugo Chavez-style ploy to get other rogue nations aligned with the NORKs so they can score more food or possibly engage in some means of generating revenue.
It is possible that Kim Jun-ior may actually give a crap and is trying to obtain something for his subjects!
I said POSSIBLE!
(A great 90 second reminder of Not-so-bright.)