LINKing will connect the device to your own account. Which then affects your own ‘played/unplayed’ statistics. And you can’t distinguish your own playback from playbacks by sharees.
So, never link other people’s devices.
Always share with them.
Use either Tautulli or the new inbuilt playback statistics to find sharees which give out their own account data. Because sooner or later they will try to access concurrently. And you will notice this.
You can then stop sharing with this user.
