Reality ?
Having designed many things for the millitary, I can say with certainty; that If there ever is a space war, you can be certain that it will involve automated space mines. Man is too expensive to put in space. A computer on the other hand is cheap, does not eat or breath or produce waste.
Anti-satellite missile systems are already in orbit around our planet.
The game could mimic those auto missile systems. They sleep most of the time of course. They are woken up by a sensor array that detects heat, mass, vibration, radiation and light. They also have a spread spectrum receiver/decoder that can be signaled by friendly ships. Once an unknown mass gets within "X" distance from the "mine" satellite and is tagged as dangerous by the onboard protocol software, a missile is fired at the target.
This could be an effective weapon and welcome addition to the game. Since the mines have an effective defensive radius of "X", they would make long range sensors a very usefull components for ships. ( I find that sensors are useless in the present game). If mines were made available with different ranges, (longer range mines would cost more of course), and, if they could only be seen by sensors, it would add a very interesting twist to the game. If the mine's sensor has a longer range than your ship's, your toast. This would certainly force players to escort all troop transports with long range fighters, and even provided an alternate way to play, by deploying lots of mines to secure your star system and reduce the number of ships. Of course, your mines can also be shot to bits! If the enemy has more sheilding than maybe the mine will not destroy it, but weaken it enough for your fighters to finish off. Plus, it would be a very cool thing to see the enemy get cought in your trap and get shot at from 3 or 4 different mines.
Anyway's I'm a yes.