For example, in a previous basketball game, I saw two empty seats, and I was going to sit down with my friend, but another person said that one seat was taken and asked where that person was, but said that he hadn't come yet, so I had to sit on the steps.
For the seat occupation problem: 1, if you are not afraid of things, just sit down boldly. Originally, the seats in places like the library were all public, and no one could sit. 2. If you are afraid of getting into trouble, you should honestly find another place. Some people are really difficult to communicate with. 3. Chatting is better than nothing. You can reflect this problem to the library staff, but seriously, this kind of thing is too common for the staff to control.
In the final analysis, it is still a question of social morality.