I'll give a very quick answer.
In that situation, as in 2007, it was a protest involving the presidents of the United States and Mexico and Prime Minister Harper. The provocateurs in that circumstance were actually police officers. There were Quebec police officers wearing masks, pretending to be protesters, mixing themselves into the crowd, and trying to incite other members of the crowd to start a riot and cause an escalation.
That is a concern that I didn't expand on at the end of my remarks. I was getting to it just a bit.... There are concerns out of the G-20 protests in Toronto, for example, where there was a concern that police were engaged in an excessive use of force. There have been independent reviews by the Special Investigations Unit and the Independent Police Review Director that there were many circumstances of excessive use of force.
With this new provision, I'm worried that people wearing a mask—perhaps for legitimate purposes—are going to have a big target on their backs when some unfortunate bad apples in police forces decide that it's now an unlawful assembly and it's time to start swinging billy clubs.