Despite using tear gas and implementing a curfew, the police lose control. The WTO summit is effectively blockaded. The demonstration is broadcast throughout the world media. Police arrest 'key activists' off the streets and at gathering centers before the demonstrations start. From the start protesters are surrounded by the police.
Police helicopters keep media choppers away.
Alternative news sources are shut down. The protests to date have been enormously successful. The difficulty in organising such events should not be underestimated. In the last few years networks have been built between people and organisations that span national border. The ability of the alternative media to cover such events, usually through the use of the internet is impressive.