"So anyone is able to scroll through all the real name of my students, just using the link /user/profile.php?id=XXX and increasing the ID number."
They're definitely not. Read the User_profiles page, carefully.
"So anyone is able to scroll through all the real name of my students, just using the link /user/profile.php?id=XXX and increasing the ID number."
They're definitely not. Read the User_profiles page, carefully.