World's Worst Cultural Mistakes
What’s Offensive: Honk on Molokai or fail to pay a police officer a fine, a.k.a. bribe, on the spot when you’re stopped for speeding in Russia, and you’ll risk everything from scorn to prison time. Remember, too, that hand gestures have different meanings in other countries—a simple “thumbs-up” is interpreted as an “up yours“ in parts of the Middle East.
What You Should Do Instead: When driving abroad, make sure you have an international driver’s license; never, ever practice road rage; and keep your hands on the wheel.
From the article World’s Worst Cultural Mistakes