This seems like a clear privacy violation to me. It may not in this case, but when you consider that data like this has its way of getting out to other people

This seems like a clear privacy violation to me. It may not in this case, but when you consider that data like this has its way of getting out to other people and used in ways not originally intended. Imagine your employer being able to pay for access to a database that has your complete location history as captured by such devices.