Can someone who understands better than me what the disadvantages of GPS accuracy are? I can understand if you can throw a nuke off target by a mile or so, you might have a totally razed airbase rather than a completely obliterated one, but who are the 'bad guys' using GPS for devious means? Are we trying to throw their road navigation off course? Why else bother with SA? We have perhaps one of the greatest facilities ever invented being allowed to the world for free, and people are putting an intentional spoiler in. Maybe I'm naive, but I really don't understand.