1 A librarian would think here is a guy with a good behaviout
2 Alibrarian would ask him to speak more softly in order not to disturb the others
3 A librarian woul ask him to be more respectful of others and not to make so much noise, sometimes he would ask him to leave the library
4 A librarian would ask him to put the book back on the shelves
5 A librarian would call the security of the campus
6 A librarian would tell him he's not at a conference but in a library!