You wrote:
As long as there is security in the Library, can it please be used to discourage beggars from circulating through the library pretending to be deaf to illicit
money from students.
Thank you.
Thank you for writing . The Security Department has been notified. If you see suspicious behaviour in the library, please report it immediately to a service desk or to a security guard.
Concordia University Library 
As stated on the Security Department”s web site, “Given Concordia University’s size and two campuses with over 70 different buildings and civic addresses, it is recommended that you call Concordia Security prior to calling 911.”
For students who carry phones, it would be a wise idea to add Concordia’s security department’s number on speed dial for such emergencies.
Check the Security Department’s web site to get the contact information: http://security.concordia.ca/contactus/