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

"When visiting Siglufjordur, it's important to respect the local customs and traditions to avoid any cultural faux pas. Firstly, punctuality is highly valued in Iceland, so always try to be on time for any appointments or social gatherings. Avoid discussing whaling, as it is a controversial topic in Iceland. Many Icelanders support it for cultural and economic reasons, while others oppose it due to environmental and animal rights concerns. Do not litter or damage the environment in any way. Icelanders are very proud of their natural landscapes and work hard to preserve them. Avoid comparing Iceland to other Scandinavian countries, as Icelanders are proud of their unique culture and heritage. Do not expect to haggle or bargain in shops or markets, as it is not a common practice in Iceland. Avoid making loud or disruptive noises, especially in public places, as Icelanders value their peace and quiet. Do not expect to pay with cash, as Iceland is one of the most cashless societies in the world. Most transactions are done electronically, so always have a credit or debit card on hand. Lastly, do not refuse an invitation to a hot tub or swimming pool. These are important social spaces in Icelandic culture, and refusing an invitation could be seen as rude," said another expat in Siglufjordur, Iceland.