In a company approaching a million employees, someone is doing something illegal/unethical every day. At that scale it doesn’t say anything about the culture as you are observing the outer ranges of a distribution.
That’s why you build systems that don’t allow for abuse whenever possible. And when it’s not possible, you create an audit trail. For example, I trust Google to make my individual search history difficult for employees to access, specific search results difficult to change, and confidential data difficult to access.
I trust the security and audit trail on Google's engineering side. I definitely do not in other areas of the company.