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

"When visiting Jeju Island in Korea, it's important to respect the local customs and traditions. Avoid making loud noises or causing disturbances in public places, as Koreans value peace and quiet. Do not disrespect or make fun of the local dialect or accent, as it is a significant part of their cultural identity. Avoid pointing with your finger, especially at people, as it is considered rude. Instead, use your whole hand to gesture. Do not tip at restaurants or taxis, as it is not customary in Korea and can sometimes be seen as offensive. Avoid refusing food or drinks offered by locals, as it can be seen as a sign of disrespect. Do not wear revealing clothing, especially in religious or sacred places, as it is considered disrespectful. Avoid touching someone without their consent, as personal space is highly valued in Korean culture. Do not blow your nose in public, as it is considered impolite. Avoid discussing sensitive topics such as politics and history, as these can lead to uncomfortable situations. Lastly, always remember to remove your shoes before entering someone's home or certain traditional restaurants," mentioned another expat when asked about moving to Jeju Island, Korea.