I don't understand what the problem is. You can turn off location tracking in Google Maps. You can see all the data it has collected in your activity page, and

I don't understand what the problem is. You can turn off location tracking in Google Maps. You can see all the data it has collected in your activity page, and you can delete all of it too. Sure, the fact that it's opt-out instead of opt-in is dodgy, but to be fair, the majority of the features we use everyday such as traffic estimation wouldn't exist without this data.