Here's the thing: if you work for a firm that recruits at a major school, students have probably been trained from day one to network. At schools like Queen's and Ivey, it's a well-oiled machine. 30 minutes to 6 hours after an information session, you receive a dozen politely-phrased e-mails from students requesting phone calls, coffee chats, case prep, hugs, freshly-baked cookies, inspirational life talks, and more.
Here's the thing though - and I'll take myself as an example because my instinct is to help a student whenever possible - a consultant doesn't want to spend their time with a student who probably won't get an interview. It sounds cold, and unfair almost, but it's the truth. When you have limited time (and we all do), to a certain extent you HAVE to be selective.