Google Wi-Fi Data Capture Unethical, But Not Illegal
The lesson for businesses and IT administrators is that you have to put forth some effort to at least give the appearance that you intend for the information to be private in order for there to be any inherent expectation of privacy. The burden should not be on Google, or the general public to have to determine whether the data you let freely fly about unencrypted is meant to be shared or is intended for a specific audience.
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