Do you need to call the police when you see someone playing monkey in the street?

When you see someone committing illegal acts (such as murder, robbery, theft, etc. In the street, you should call the police, and the people's police will soon come to subdue or arrest the criminals.

You saw someone playing with monkeys in the street and asked if you should call the police. The answer is as follows:

Playing with monkeys is a legal acrobatic performance, so it is inappropriate for you to call the police. You should learn a little legal knowledge and understand what is illegal. What is a legal act?