It's a bit different to actually shutting down to avoid detection, though. From a visual standpoint we'd have to have some sort of effect - like screens and indicator LEDs going dark in the cockpit. From a coding standpoint the AI would have to have a lot of trouble detecting craft that have shut down, no idea how difficult that part would be. Lastly we'd need some sort of a power up / power down sequence, hopefully with animated effects for screens turning on and off, etc. We could also have a "dark" mode where you just glide forward with most systems off to reduce visibility. Overall, a lot of work. But yea, would be cool.