&gt;There is no such thing as 100% security. You can build a fence and try to say &quot;but someone who really wants to get in will bring a wire-cutter,&quot; but that&#x27;s just missing the point. The point is that a fence is cheap, and you want as much security as you can reasonably afford.<p>TSA Annual budget: $7.39 billion (2014)<p>&gt;There&#x27;s no way anything will stop anyone who really wants to get on a plane. But when you play a game of chess, you don&#x27;t try to play a perfect game, you try to play the game that gives your opponent the most opportunities to make mistakes. You force your opponent to make decisions, because that&#x27;s how they end up making the wrong decisions and get caught.<p>Yes, but when you play a game of chess you try. Have you even seen a US state ID? They&#x27;re not trying.<p>&gt;So go ahead and make a fake ID. You&#x27;ll fail to board more by doing that than you will if the airport doesn&#x27;t even bother to ask for ID.<p>And by asking for IDs you achieve what? How many terrorists has the TSA stopped because they had fake IDs?