
Doesn't the EOTS system also allow for BVR visual identification? Even the DAS system, which is a wide-angle close-range system, provides pretty awesome resolution (you can clearly see wave caps and small moving vehicles from a pretty good distance away), and the EOTS is designed for narrow-image, long-range operation, so it should be much better. Since the EOTS can be slewed to the radar and has digital zoom capabilities, it would seem to be a great way to get a VID on a target a long way out after it is initially detected on radar. The EOTS, like most IRST systems, would probably be a poor system to detect other aircraft, since it has a narrow FOV, but it should be great at identifying unknown targets.
I think I saw a video somewhere showing an EOTS image where individual windows on a building were visible 50+ kilometers away. The image switched to a residential area, and I could literally count the shingles on roofs. That system is amazing...
Personally, I'd say that between the EOTS, NCTR, track correlation (i.e. if no friendlies are scheduled to fly near an area where a contact has been detected, the contact probably isn't a friendly), and IFF (which I've heard can be unreliable, but is probably at least somewhat useful), the F-35 should have a pretty good capability to identify targets at long range. Of course, I don't have any direct experience with military equipment or ROEs, so this is all just me postulating on a subject I don't have an incredible amount of experience about.