Red Herring?
How come I haven't heard
Terry Wallis mentioned at all by those who want to save Terri Schiavo.
Granted, comatose ain't vegetative, but still, I would expect some comparison.
UPDATE: Because in this highly-complicated case in which most commentators have incomplete or inadequate knowledge, it's important to introduce more incomparable situations as direct metaphors for the possibilities. Obfuscation through opination. That's the other thing the blogosphere does best.