What uncivilized behavior is there in the library?

In the campus library, the most unacceptable behavior for me is to place books at will. The books in the campus library are arranged neatly, and some people are just uncivilized. After reading the books, they put them at will, not in the original place, but on some shelves at will, which will affect the reading of the next reader and the cleanliness of the campus library. In the campus library, when reading books, some people always like to destroy them, or paint them with the marks they want. This behavior is unacceptable and very uncivilized. The damage caused to books has also affected the impression of the next reader. In the campus library, some people also like to steal books. In some campus libraries, because the security measures are not so perfect, it is said that after seeing the books they like, some people will have the idea of taking this book back to their homes and making it their own, so they will steal books, which will cause economic losses to the campus library, and it is also very uncivilized. It is a crime. Turn up the alarm of your mobile phone very loudly. Everyone knows that the library is a quiet place, and a quiet reading environment can give readers the best enjoyment. However, when some people enter the library, they don't mute their mobile phones, but still set them to a loud voice, which will disturb many readers, which is really unacceptable. There are still some people who can guess a lot of things from one position, but they have to put these things in other positions one by one, which occupies other space and affects other readers because they can't sit in the position to read.