The location of every plane that flies in the US (99.99999999%) is public data. If you want to take your big old metal tube up in the air, then you abide by the

The location of every plane that flies in the US (99.99999999%) is public data. If you want to take your big old metal tube up in the air, then you abide by the rules set forth by the party in charge of the air. We, as a society, have decided that those planes have an ID and if that plane wants to enter the air, then they agree to be tracked. That's the terms of service. There is no privacy violation.