I wonder if they could go the next step and make it fall back on Mr Kim's compound --then he'd suspect one of two things, his own people were trying to get him or-- as adversary had critically compromised his systems. Both scenarios would be equally devastating for his goals.
Scuttling them at sea is nice and all --having them go up and straight back down would present the regime with quite a problem.
That seems to be a preferable approach since space lasers would require allowing NK to build a functional missile in the first place. If it is possible to sabotage the actual design at some critical point they can be prevented from creating functional missiles at all.
Building rockets is hard, even if you know what you are doing.
Neither Russia nor PRC have any interest in DPRK developing their nuclear arsenal. DPRK is resource-constrained (to say the least), and that's not just about money.
Directed energy weapons used similar to the way kidney stones are dissolved. Several weaker signals constructively interfere directly at the location of the target providing a destructive amount of energy but without a single traceable point of origin?
Not really. In the first two years (from May 1957 to May 1959), R-7 had 56% failure rate (23 launches, 13 failures). It is now one of the most reliable rockets.