While I personally feel many of the rules are foolish, I am also pretty sure that the TSA is aware of its failings, its inability to catch everything. But it does catch a lot, even if much of that lot is futile, small pointy items of no real danger now that we know what the hijackings would be for.
To trick security, whether as a private citzen getting a thrill out of being so smart, or a news organization setting up a story, is not a great idea. It will only encourage others to be sure they can get away with it too. Most of them will be dumb kids who will end up in a lot of trouble. Some will be malicious, sure now that their time to triumph has arrived.
Law enforcement already routinely simulates penetration of security. Why make it harder for the TSA to protect us from the irresponsible of the world?
Sentence him to pay back the cost of countering his little exercise.