Be very suspicious if the advertised price of a Caribbean cruise includes the phrase "Free Ammo".
Consider carefully before visiting a country where the license plate motto is "Die American Pig".
There is no legitimate reason for a travel agent to need to know if you have experience in jungle warfare.
If you find yourself in Iran, do not use the word blanket-head.
On a trip to Canada, your travel agent should not charge you for an interpreter.
While in the Vatican, do not refer to St. Peter as "Petey-Boy."
Do not board a cruise ship if passengers are being issued oars.
Avoid any Latin American Tour named Bay of Pigs II.
In South America, say "no" to anyone wanting you to deliver a suitcase of powdered sugar to their grandmother in Miami.
Legitimate travel agents do not dress in foreign military uniforms.
Enjoy your vacation!