Yes, landmines are unnecessary between North and South Korea, because they cause a great deal of personal harm. Without landmines, more people would be able to escape into South Korea and live in freedom. The landmines cause more harm than good, because people do not think they can try to escape North Korea and have a better life in the South.
Landmines are not unnecessary between North Korea and South Korea. While they may seem like they are evil and extremely unnecessary, land mines provide a cushion from one country to another. If they were not there, then there would be many defections from North Korea, causing a civil war that would cost many lives.