Of course, you wouldn't encode real-time navigation data, but a small block of identifying text. Either way, though, someone without a copy of the spreading code isn't going to notice it or decode it. Given enough redundancy in both the time and frequency domains, removing it wouldn't be easy either.
For reference, look at how the societal damage of social networks has been handled: too little, too late. Same goes for RentTech.
But, I don't know the solution. The common computer has become so powerful that we cannot simply rely on inaccessible materials to prevent the danger of overly-powerful tech spreading too fast, as we do with bioweapons or traditional WMDs.
Fight tech with more tech, I suppose.
We want to go back to New York in the 90s? Petty theft everywhere?
With great power comes .... ? Profit?