I agree.
I think the point is about the intent of people. In my experience, with a major event there is a very high degree of contact between protesters of all groups and security personnel. Everybody wants to be clear on what is going to happen. There is probably much more contact than the public realizes; that is, the negotiation and agreement on what will happen. If the vast majority of people realize that it would be illegal—if this act passes—to wear a mask, then the vast majority will not be wearing masks.