I think generally countries that pre clear outside the US think our rules are so strict they're overzealous of what can be brought on planes. Flying from Panama i had someone ask me to remove all my wire coat hangers from the suiter because US wouldnt allow it. Another said you cant fly with lighters because the US wont allow it. Another wouldnt let me fly with fishing reels because the US wont allow it. We all know that these things are fine in carry on luggage flying domestically.