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

"It is important to be mindful of cultural norms when visiting Johor Bahru. It is important to dress modestly and to avoid public displays of affection. It is also important to be respectful of religious beliefs and practices, and to avoid making derogatory comments about any religion. Additionally, it is important to be aware of local customs and to avoid offending anyone by speaking too loudly or using inappropriate language. Finally, it is important to be respectful of the local culture and to avoid making assumptions about the people or their customs," said another expat in Johor Bahru, Malaysia.