Does this "Security Theater" actually scare away a would-be terrorist?
I very much doubt it. Also it would be a lot easier to just bribe/threaten/blackmail an airport employee to "forget" to lock a gate or similar and get anything you want in that way.
If any other search engine was worth any time, then those would be full of SEO as well. SEO is a huge buisness and as long as people just click on the first or second links (yes, they do) then it will continue.
Google and other search engines can try to combat it but as long as the money involved are good, it will not go away.