Also, this assumes the checks are actually performed - which is a compute intensive operation for a human (names in various languages, etc). I once accidentally

Also, this assumes the checks are actually performed - which is a compute intensive operation for a human (names in various languages, etc). I once accidentally swapped passports with my wife, and we both boarded without questions. We dont share last names, and, of course, dont look much alike. Its bad security to rely on tired people doing annoying repeatable tasks where the risk of something going wrong is so low.