For the rest of his natural life? Not even rapists receive such a harsh penalty in our society. But you do bring up an interesting point. You say he knew about the security checkpoint because he had already gone through it. It can be argued then(no matter how dubiously) that in his mind at least he constituted no security risk since he had passed the security earlier.
I will give up my US citizenship if it really comes to this. You would lock me up or punish me for life because I inconvenienced people? What about the guy who doesn't want to sell his house to the government so they can build an interstate through his property? He is also "inconveniencing people". Think- Clinton Presidential Library.