As long as it doesn't involve library regulations, there is no question of whether personal freedom is appropriate or not.

I suggest that librarians don't often see you playing with your mobile phone. I also had this habit when I was in college. Some people will say, I go to class to play, some people will joke in the dormitory, and the library is really safe. There is no problem for the librarian not to report. Besides, his job is to maintain the learning environment, as long as it does not affect the atmosphere of the whole library. It's okay.

Can you understand this explanation? Beauty comes first.