What if indeed Terri wished for her life not to be sustained whilst in this state? If indeed this is the case and she, as has been contended, does indeed have some level of awareness of her circumstances, then think about the mental anguish and torture she may be going through.
I would think that if indeed Terri wished to have her life sustained through scientific means regardless of her state of physical or mental ability and she indeed has some level of awareness she is also going through a great deal of mental anguish and torture knowing that her life is not being sustained.
This is why I cannot have an opinion about the merits of either side in this particular case. I simply do not posses the wisdom necessary. To "err on the side of life" may cause suffering as may erring on the side of "right to die".
This ethical conundrum to me is a direct effect of man's (species not gender) ego interfering in the design and balance when we do not, and in my opinion will never, have the necessary wisdom or understanding.
I pray that the Lord brings peace to Terri, her whole family, and all on all sides of this issue that have invested their emotions in the compassionate way they have.