> Any sensitive military aircraft would (should) not be transmitting this data, and so would not show up on these services. In addition to jjwiseman's comment

> Any sensitive military aircraft would (should) not be transmitting this data, and so would not show up on these services. In addition to jjwiseman's comment that Mode S tracking and TIS-B are still widely useful (something you can easily see for yourself in many parts of the world, including around the 305th Bomb Wing in Tampa (near my recent home of St. Pete), which are a joy and marvel to watch), I want to add one more comment: I don't think it's reasonable to take as granted that any particular party (especially those which are taxpayer-funded ) "should" refrain from transmitting surveillance and telemetry data. Rather, I hope we develop a society in which anybody who is flying a large, fast, dangerous piece of metal through the sky is required to report, via such an open standard, these details for all to see.