Have you ever seen a tourist in your city do something odd, and they don't even think twice about it? Or have you been traveling and the locals give you the side eye? Travelers know there's a multitude of cultures differences within every country, and one should have the decency to take the five minutes to Google those social norms before jetting off. For example, Europeans should know that tipping is customary here in the States, but some feign ignorance even though it's a well known custom. But that's a pretty basic example. International Redditors share their countries socially acceptable actions that didn't work out so well when traveling abroad.