For those few who think the kids are just protesting for the sake of protest:
The kids (and adults) object mainly to FTAA and GATS.
The FTAA is the planned expansion/extremization of NAFTA, see e.g.
http://mai.flora.org/forum/24335
The ultimate goal of GATS is to privatize every service sector in every WTO
country -- including essential services such as health care, education, and
drinking water. Regulations that protect the environment and consumers will
be substantially weakened. For a summary on GATS, see e.g.
http://mai.flora.org/forum/24843 -- GATS: An End to Democracy
HTH,
Chris