If participants or protestors won't shut up and keep disrupting the event, they should get kicked out by security.
Why don't you read what actually happened instead of making up your own version and commenting about it?
From what I can tell, all the protestors did was put up flyers and banners. The Novell reps then told the organizers that the organizers would not be getting their sponsor money if the banners and flyers remained up. The organizers then demanded that the protestors take them down; the protestors refused. The organizers then decided to call the cops and forcibly remove the protestors, the banners, and any visual documentation of their actions.
So, basically the protesters disrupted the event and got the cops called when they refused to stop?