uhh way incorrect. and I am a contractor for Customs! When I came back from the World Cup in Brasil I definitely got grilled, mainly because on my US Passport it displays the unfortunate (only when travelling) fact that I was born in Iran. Ok that and maybe because I grew a full beard that didnt match my passport photo, but still ;)

Just be respectfull as much as you can even though you just flew multiple hours and it's 1am and all you want is a clean shower and a fine meal just because Argentina lost another final... ahh sorry bad memories