Why are you assuming this is automatically a surveillance tool? It's not a drone with the explicit intent to search for something. It's a way to get Internet to people.
If this takes off, wifi repeaters and solar charging stations will appear in villages and towns, and guess what with that detail each user will hand over position, time and search information - every drop able to glean more about them than the secret polices best efforts.
Our only hope is it is like rain - it surveils the just and unjust alike
Google often cooperates with government and police.
Next you're going to tell me that they're considered a legal entity in many countries.
In any case, you'll have a lot more privacy if you stop using Google services.
[0] http://techpresident.com/news/wegov/23918/denmark-government...