CTV's Daniele Hamamdjian said "a combination of overcapacity and utter disorganization" contributed to the collapse of the event.
Prior to the cancellation, Hamamdjian said only a small number of students were tasked with verifying the names of the people who had signed up to attend Coulter's talk.
"It was a disaster in terms of just organization, which is probably one of the reasons why it was cancelled," Hamamdjian told CTV News Channel from Ottawa on Wednesday morning.
Police eventually showed up to the scene and blocked the door to the building, but Hamamdjian said she doubted whether the combination of protesters and disorganization actually constituted "a physical risk to Ann Coulter."
By the way, all reports of tables being "thrown aside" emanate from Deb Gyapong's twitter feed, as far as I can tell. She now says she was not actually witness to these events.
deBeauxOs notes in the comments that it's the Ottawa Campus Conservatives that organized this event, as confirmed by D. Akins' original post.