Another point of interest: Karen Ann Quinlan, the person featured in a documentary Terri supposedly watched just before making her supposed remark to Michael Schiavo about not wanting to be "connected to tubes" was, as a result of a court battle, disconected from a ventilator, and then started breathing on her own. If Terri actually made the remarks attributed to her, they would if anything suggest that efforts should be made to wean her from the feeding tube not by fatal dehydration, but by teaching her to eat.
To put things in original context, if Terri were put on a ventilator, her remarks might be taken as justification to disconnect the ventilator and allow her to try to breathe on her own. Michael would take them as justification to disconnect the ventilator and hold a pillow over her face to ensure she couldn't breathe on her own.
You've said that very well!