Knowing that NK ships will be boarded, Kim will send out a ship either on a suicide mission (e.g. detonate a chemical or nuclear warhead when boarded) or else the ship will be packed with completely innocuous cargo (e.g. canned milk for babies) or a diplomatic time-bomb (e.g. a high-ranking Chinese or Russian or Iranian muckety-muck).
NK/China/Russia/Iran will then use the incident to justify their next move.
Game on!
You could be on to something. Kim knows we'd be watching all ships leaving his ports, and now only days after the resolution is passed, a North Korea vessel with a suspicious history leaves port....
Iranian. A Russian or Chinese wouldn't want to be on a N Kor ship. There are standards Russians or Chinese wouldn't sink beneath.
Sneaky little bastards aint they!