If you have to explain the sarcasm, it didn't come through. This post is not nearly as clever as you seem to think it is.
edit: also, shard collaboration has been an established practice for as long as the game has existed; if the devs were against it in practice and wanted to enforce this, they would have taken some action, even a token effort, to signal to the playerbase that this is not okay. Shard chats are not a secret and CG clearly accept them as part of the game's environment, just like Discord and the legion of 3rd party bots and websites.