This guy is the master.

Though I did once cross the Gibraltar/Spain border with only a dry cleaning receipt.

That's pretty awesome, though it was most likely at a secondary checkpoint.

Actually, the land borders are pretty straightforward like this. I know I've crossed the US/Mexico border tons of times and simply been asked what my nationality was. Of course, that was pre-9/11 so I don't know how hardcore they are now but back then, if you "looked" American, they were just listening for the accent.

You should watch the one where he got tasered by the police, and a little bit of the following court case.

Knowing of, but not really thinking of the fact that Switzerland is no member of EU, I went to Zurich for the wedding of a friend of mine. No control at my immigration but when I was going back, I felt a bit hot because I realized that I did not have my passport on me. Austrian customs, very nicely, obviously convinced by my Austrian accent and my UN-ID card that I carried (which is NOT a travel document), let me go through without problems! That was back in 1998.

That's pretty awesome, though it was most likely at a secondary checkpoint.

My thoughts! For sure not at a border crossing!