I agree with you on that, and I'm not recommending people do this, but I recall we had a thread here last year (?) where someone basically said..."FO, there is nothing you can do, the purpose of my trip is none of your business, I'm an American citizen, you have have to let me in." While he did enjoy a few hours in a small room, they eventually let him go because...there was nothing else they could do.

Maybe someone can dig out that thread and merge this.