They don't have to make an official statement when we can see the accounts no longer exist the next season. As for your suggested change, I agree with you regarding hiding the player's name and clan until the attack is over. However, it isn't so simple because they would still work around it a bit by having decorations set up a certain way, so I'd remove those from the screen the attacking player sees too. That then leaves arranging actual buildings in a way to alert others "on the team" to who you are.