The real question is: is this creepy or ingenious?
The reality is that their products are the best because they are able to crowdsource the masses for practically free.
Google Maps- How do you think they are so good with traffic and or know when a place is busy?
[Google admits it tracked user location data even when the setting was turned off](https://www.theverge.com/2017/11/21/16684818/google-location...)
Tensorflow- All those captchas you had to type and click? Yeah they were used to digitize books and build an amazing clean image dataset.
[Google Inc. Acquires Carnegie Mellon Spin-off ReCAPTCHA Inc.](https://www.cs.cmu.edu/news/google-inc-acquires-carnegie-mel...)
(https://techcrunch.com/2007/09/16/recaptcha-using-captchas-t...)
Some of it may be unethical, because they do not do a great job of explicitly stating what they do with your data, but some of it may be for the greater good.(intentions are not bad.) An example is traffic. I think in this case, I would like them to know so that they can warn/tell others, to save others time.
It is the wild wild west when it comes to data privacy laws in the U.S compared to the E.U, because there are none and (currently) it is easier to beg for forgiveness than ask for permission.