Google keyword warrants give U.S. government data on search users
In principle I don't have a problem with the police getting a warrant to find out who searched for a specific name or place in a constrained time frame. It's a bit like the police asking the library who checked out a specific book.The problem is that this could obviously be used with keywords that target a wide group of people, e.g. finding everyone who plans to attend a protest. If we continue to allow keyword warrants we should add a law limiting their reach, e.g. by limiting the number of people who can be revealed in the answer to any one such warrant.