What are the measures to prevent people from causing trouble and causing damage to the ice rink?

It depends on how much money you have to invest.

There are three main ways:

First, build a professional security team (2-6 people). Veterans or retired special forces personnel can be hired to conduct public exercises in a small area to prevent ruffians from causing trouble. If you encounter someone causing trouble, just control his arrogance and don't hurt anyone. It's better to send him to the police station.

Second, install a camera and use the video for legal evidence. Cameras may not necessarily be effective, but slogans can generally shock people. For example, after installing cameras, put up slogans such as "monitoring range" or "24-hour monitoring".

Third, establish a good relationship with the local police station. They only need to dispatch once or twice to make the gangsters clearly realize that the owner of the skating rink is not easy to mess with through training and other methods.

Finally: Don’t go too far in any method, as it can easily cause reverse effects. A strong dragon will not overwhelm a local snake.

If you have enough funds, you should open a real ice rink in a high-end place so that those gangsters can't get in, because you can be managed by the security of the shopping mall.