Here's the deal. Whether it's legal or not, it's going on. No joke. We know this. Pretty much everywhere.
I speak from experience. I had no say in the matter, but it happened, and all I could do personally was watch. I was horrified. There was even the presence of a living will.
The problem is that if this is what the situation is like now, what will it be in 40 years? 30? 20? The issue isn't that Terri was a rarity. It's that she no longer is, and we do not only need, but must dig in while we can. That is to say, before we're handed shovels to dig our own graves.