If it's that easy, the FBI could setup a system to run that command all the time and grep through the log as needed.
Last time I checked, the FBI isn't allowed to do things we can't do either. If it's illegal in New Hampshire, it's illegal for the FBI in New Hampshire. Of course, the FBI could get a wiretap order from a judge in pursuit of a criminal matter, and then it's a different story entirely.
All I'm saying is that I want us to agree that we don't make such logs public. Please stick to the point.