Can you trust the government? No. That's why we have regular elections to minimize exposure. Can you trust big corporations? No. The CEOs of huge corporations like Google are responsible first and foremost to their share holders. Pissing the government off tends to lead to troublesome inquiries and so on, so fo course Google is going to play ball. Can you trust yourself? Yup. Google is NOT the internet. You can limit the information they have on you. There are other search engines. Duck Duck Go is a good example of this. No free email service is secure, but you can use plugins like thunderbird-enigmail to encrypt and sign your messages, or, if you have the technical chops, run your own mail server in-house. You can use anonymizing technologies like TOR and I2P to keep your browsing habits private. Your privacy is always going to be in far better hands with yourself than with a third party anyway.