What cultural faux pas should I try to avoid making in Isafjordur?

"In Isafjordur, it is considered rude to show up unannounced at someone's home. Always make sure to call ahead or make plans in advance. Icelanders value their personal space, so avoid standing too close to someone or touching them unless you are close friends or family. It's considered impolite to interrupt or speak loudly in public places. Icelanders are generally soft-spoken and appreciate when others respect this cultural norm. In Iceland, tipping is not customary. Service charges are included in the bill, so adding a tip can be seen as unnecessary or even excessive. Icelanders are proud of their language, so making fun of Icelandic names or language can be seen as disrespectful. It's also important to respect the environment. Littering, off-road driving, or damaging natural sites is not only illegal but also deeply frowned upon. Lastly, don't assume everyone believes in elves and trolls. While folklore is a big part of Icelandic culture, not everyone takes these stories literally. Making assumptions or jokes about it can be seen as disrespectful," mentioned another expat when asked about moving to Isafjordur, Iceland.