The Euthanasia.

I know that the Euthanasia is praticed in many countries with animals that need to be sacrificed or offering dangerous for the people, but and with humans???
This is a really polemic topic. I don't have a solid opinion about it, but I have some thoughts that I would like to explain.
First of all is true that when the person is in a comatose breathing through respirator equipments, he/she can not decide about his/her life. The family is the only one that can do it.
If the doctor prognosis be that the person is going to stay in a vegetative state forever, and just a miracle could revived him/her, its of the family the right to decide about the person's life. About this decision I don't have a solid opinion, each case is one different case, but I think the family know which one is better, live or let to die. They know the person enough to take this decision, and they know what the person would like to do if he/she was still conscient.
Talking about this topic is very difficulty and polemic, many people have very strong opinion about that, and it can cause long discussions. I still remenber listening many discussions about that in hi school and in the university too, many people trying to explain their ideias and their view points.
Do you think the familiy should unhook the respirator??? Or in some cases or apply the euthanasia???
I would like to know what do you think about it, leave your comentary.