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

"In Najran, it is considered disrespectful to refuse hospitality, such as food or drink, when it is offered to you. Public displays of affection between men and women are frowned upon due to the conservative nature of Saudi Arabian society. It is also considered inappropriate to discuss politics or criticize the Saudi royal family or government. Women are expected to dress modestly, covering their hair, arms, and legs. Men should also dress conservatively, avoiding shorts and sleeveless shirts. It is considered rude to show the soles of your feet or shoes to others, as this is seen as a sign of disrespect. During the holy month of Ramadan, eating, drinking, or smoking in public during daylight hours is considered disrespectful. It is also important to avoid making negative comments about Islam, as Saudi Arabia is a deeply religious country. Taking photographs of people, especially women, without their permission is considered disrespectful and can lead to serious consequences. It is also considered impolite to refuse an invitation to someone's home. Finally, punctuality is not highly valued in Saudi Arabian culture, so do not be offended if your hosts or colleagues are late for meetings or social events," said another expat in Najran, Saudi Arabia.