How does this change things legally?
It may not. But in theory here's how:
The magazines say how to treat disfellowshipped people; Like garbage.
If they announce: Bob is disfellowshipped. Then they are saying: "Treat Bob like garbage."
But they never actually SAY: "Bob is disfellowshipped." They say: "Bob is no longer one of Jehovah's Witnesses."
Now of course every witness in the building KNOWS what that actually means. But they never officially say it.
So the law can come back and say: "You told Bob's family to treat Bob like garbage!"
The witnesses can say: "No we didn't, they did that all on their own. We said to treat 'disfellowshipped' people like garbage, but we never said Bob was disfellowshipped! Their own consciences must have compelled them, not us."