How can you check that you have been opted out and government really has no access to your private data? Think of government data stored permanently. Wnen you are opted out it is you who is opted out from access to your data, not the government. If you do not have effective means of control, your privacy most prodably will be abused without you knowing. There was quite a thread here last year about software engineer with a prison record. You simply cannot exercise right to forget. There is no way to get out of the digital prison.

You can't opt out of government tracking. The GP was talking about commercial tracking.

I got no means to check that either. What stops Google from opting me out of my data, but continue to sell or use it in the background?