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

"In Causeway Bay, it is considered impolite to point with your index finger, instead, use your whole hand. Avoid discussing politics, especially the relationship between Hong Kong and China, as it can be a sensitive topic. Do not take photos of people without their permission, as it is seen as an invasion of privacy. When using chopsticks, do not stick them vertically into your bowl of rice as it is associated with funerals. Also, avoid tapping your chopsticks on the edge of your bowl, as it is considered rude. In public transportation, give up your seat for the elderly, pregnant women, and people with disabilities. Do not talk loudly on your phone or play music without headphones. When visiting temples, dress modestly and avoid taking pictures inside unless it's allowed. Also, do not touch any religious artifacts or statues. Tipping is not a common practice in Hong Kong, and it can sometimes be seen as insulting. However, in some high-end restaurants, a service charge may be added to your bill. Lastly, remember to respect personal space. Hong Kong is a densely populated city, but locals value their personal space. Avoid unnecessary physical contact, such as hugging or touching someone's arm during a conversation," said another expat in Causeway Bay, Hong Kong.