Let's suppose Kim, Jung-un has a problem with people crossing over into SK. Do you think he'll use less than lethal weapons, or do you think he'll go for the assault rifles?

Parent Post implied that had the DDR had these sonic weapons the Berlin Wall would not have fallen... as if The DDR would not have had the willingness to put a stop to it if they wanted to. What happened is they announced publicly that they had a change of heart and would let people cross. And so people did.

If you're leading a country as a stong[man] and you want to retain control, it is imperative you use strong tactics --anything less is seen as a weakness by (good or bad) adversaries, and rightly so.