Oh crap, I forgot about this thread...and I promised I would reply...
People have already gone over the legalities of the issue, so I won't go there...
The criteria to meet for consideration of euthenasia should be as follows:
Unable to communicate in any fashion.
or
Suffering from chronic pain, are of sound mind and able to communicate their wish to die.
...it is my belief that after a person has lost their mental function, and is unable to communicate in any way, they no longer offer any value to society.
My mother works in a nursing home, and I've been there to take her to lunch on occasion. I am often amazed at the state of some of the people there, unable to speak, unable to walk, unable to feed themselves or maintain any form of dignity.
I've talked with her about the euthanasia issue, and found that her views closely match mine. Her reasoning is that the family, when discussing with the doctors the issue of "Do Not Resuscitate" orders, will invariably become drama queens, and make their decisions from an emotional state of mind...some will later relent, but most will not...as if this isn't enough, she says that most of the people that reject the notion of "DNR" orders are those that never visit their relatives anyway...they've dumped them and forgotten...so every time the resident goes into cardiac arrest, or has an infection or falls and breaks a hip, the nursing staff is legally required to do their best to bring them back from the dead...
I say let them go...as tibear said earlier in the thread, it comes down to quality of life, and to me, at that point, they have no quality of life, and no there is no dignity left to them...but, I guess letting them die is not really euthenasia, really...
...that's my explanation of my views for the first point...and for the second it just comes down to dignity and how people, if found to be in sound mind, should have a right to die...