An Article by  Robert Sibley, Ottawa Citizen March 30, 2011  in the Ottawa Citizen is worth a read. It begins:

Carleton University administrators were forced Tuesday to abandon a meeting of the board of governors when approximately 200 students, yelling, chanting and shouting slogans about democracy, blocked access to the meeting room.

The students effectively occupied the atrium of Robertston Hall, preventing several board members from attending a meeting that included, among other agenda items, consideration of the university's operating budget. While campus safety staff were much in evidence, they were unable to ensure access to the meeting for arriving board members.

Read more: http://www.ottawacitizen.com/business/Carleton+board+meeting+cancelled+students+block+access/4525703/story.html#ixzz1ID8SE159