Indeed and Google has built its empire through tracking users across the internet so it is really hard to trust that they won't..
The spying and tracking started pretty quickly though and they've repeatedly demonstrated that they can't be trusted. They've even violated the law on several occasions in efforts to collect data they had no right to.
"If you have something that you don't want anyone to know, maybe you shouldn't be doing it in the first place." - Eric Schmidt CEO of Google