A smarter customs agent head might have said “sir we found two cartridges in your luggage, this is illegal in our country and I am confiscating them with your permission, if you refuse we will have to arrest you and detain your return to the USA, do we have your permission?” “Thank your for your visit, please on your return to our paradise, Check your luggage more carefully, thank you for your cooperation.”
They are off my list as well.