1. Do not Eat, drink, or smoke during Ramadan hours.
2. Don't display any affection in public places and gatherings.
3.Do not use abusive words on others.
4. Do not gossip or say any false thing about someone.
5.Do not take photo of individuals without permission. You can be jailed for it.
These and many more are there for you to take note when you are in Dubai.
Save yourself, apart from the laws, Dubai is a beautiful country and home to many other nationalities.