Easily defeated by reversing the process, just feed that document into an AI to summarize it and don’t quote literally. If it’s something like voter’s list, just add your own bogus entries on top of it.
What would adding your own canaries achieve? They know the channel that is leaking from any canary you can't remove.
To dilute the list and add more to confusion, court hardly will accept it, in this case, they won’t be able to shut it down since it has other bogus entries.