The fact that Terri didn't have a living will makes this case difficult.
Removing a feeding tube from someone in her condition and allowing them to starve to death is one of the more humane ways of allowing her to die.
Here's a link about it.
Now states have different laws so what applies here in Connecticut may or may not apply in Florida. Whatever the outcome of this will be (remember they can still reinsert the tube) may not be the same if it happened in another state.
One thing I don't see in any of the stories is who's paying for her care. That may also influence this case, especially if it's her husband and/or the parents.
I agree with Koko Ed, this is a private matter between the husband and parents. There's no reason the legislatures should be involved with this and it will only complicate matters and possibly futher draw this case out.