I’ve seen videos from a European’s PoV regarding the presence of either American expats or tourists speaking loud at venues (like indoor restaurants or hotels) where one is expected to use their inside voice rather than yelling from the top of their lungs.
Is it a cultural difference they are unaware of before they even stepped foot into a European country? To clarify: you’re just sitting on the table minding your own business but you can hear them talk across the venue using their outside voice whilst indoors.
Even though you may remain indifferent: rather it’s inconsiderate when it comes to common courtesy in public spaces. It’s the same in reverse like while a European speaks normally is responded by being yelled at from an American despite being next to each other.
When I toured in Europe, I made it a point to just stfu unless I was spoken to. I wanted to blend in and not be the stereotypical American tourist.
Having said that, I ran into a couple of Americans while in Norway. Jesus Christ, they were obnoxious (and from Florida).