I suppose the argument is, when there's a person in the loop it's easier to notice funny business. If someone hops on the ATC frequency, the odds are someone wi

I suppose the argument is, when there's a person in the loop it's easier to notice funny business. If someone hops on the ATC frequency, the odds are someone will notice more quickly. When it's mediated by a computer, you tend to trust it as a magic box of truth- and injecting subtle errors is going to be easier with ADS-B than on a voice channel, isn't it?