Google is an Internet advertisement company. When they find out data about me, they use it to give me better ads. This means that both me and the advertisers are more happy. If Google wanted to, however, I'm sure they could find out almost everything about me and track what I do. Unfortunately for conspiracy theorists, the reality is that Google is a company and I doubt that tracking everything about everyone is on their lists of good returns on investment. And even if they did track everything about everyone, the worst they could do is bring criminals to justice, which is completely okay with me.