I am not sure expelling this student for being the admin of a virtual study group is the answer to this problem. If what the students say is true, they were only using the group to help each other, much as people do in a real f2f study group, not give answers to homework or tests. There has to be a better way to have this discussion with students.
It is likely that the administrators of Ryerson University do not know what was actually going on within the facebook group and do not understand how the students were using the technology. This is a classic example of cutting of your arm because you have a hangnail on your finger.
–Jane, doubts many of the “adults” in this situation have spent time in facebook