Mercy Killing: good care or bad law?

Mercy killing is an easy or painless death, or the intentional ending of the life of a person suffering from an incurable or painful disease at his or her request.  Mercy killing is also called euthanasia which is separated into two categories: active euthanasia and passive euthanasia. Active euthanasia can be considered murder or manslaughter, whereas passive euthanasia is accepted by professional medical societies, and by the law under certain circumstances. 

Mercy killing is a controversial issue. It could be a reasonable request for who is suffering from painful or incurable disease. However, it could be a murder by an evil purpose, or mistake of medical examination or decision.

In South Korea, first mercy killing was performed.

After 10 hours, the patient is still alive without any treatment. People are arguing that “Is the patient really in condition that needs mercy killing?”, “Is her family and the court had a right decision?”, or “Is there mercy in mercy killing.”

In my opinion, people have a right to “die with dignity” and mercy killing could relieve patient’s and his/her family’s pain. Patient might have terrible pain from a disease or treatment. His/her family might also have a mental pain or financial problem to support the patient. For those people, mercy killing could be one possible way to relieve a pain. However, mercy killing is possible to turn it to evil account. Hospital could recommend mercy killing to poor family who might not have enough money for a treatment. A patient who is in the vegetable state could have unwanted mercy killing. A small mistake from medical examination could take one’s precious life away from one who has a curable disease. Therefore, I would say that if mercy killing is really necessary, strict and precise conditions and plans need to minimize a misuse of mercy killing.

Is mercy killing good or bad? Is it justified?
What do you think?