I have never been banned from a casino, but I have heard stories of people who have. Usually, being banned from a casino is a result of either cheating, causing a disturbance, or engaging in illegal activity on the premises. My advice to avoid being banned from a casino is to always follow the rules and regulations, treat staff and other patrons with respect, and refrain from any behavior that could be seen as suspicious or deceitful. It's important to remember that casinos have strict security measures in place, and they take any violations of their policies very seriously. So, my best advice is to always conduct yourself in a responsible and respectable manner while at a casino in order to avoid any issues that could lead to being banned.