Add the ability to link two Troll's Third Eyes.
By clicking one eye on the other, we can get the receiver eye and the transmitter eye. The receiver eye is the eye we will look into, and we can place the transmitter eye in the world. Then, if hearthling is looking into receiver eye the transmitter eye marks in red. When someone finds an eye-transmitter, he can try to pick up the eye, if the one who picks has more strength than the viewer's perception, then the viewer receives a black-eyed wound and eye disappears just like a hat and reappears in the same container as the receiving eye.
The greater the distance between the eyes, the more perception is needed;
Transmitter eye should not work in containers and must have a bounding box so that it cannot be covered with a stockpile.
I think this mechanic will not be superfluous, and will add an in-game ability to monitor the territory. At this moment people are just using alts for this task.