If the message that soy is used to make paint and cardboard boxes isn't enough, check out the following:

http://www.t-mag.com/nation_articles/302poison.jsp
http://www.westonaprice.org/soy/index.html
http://www.theomnivore.com/The%20Soy%20Page.html
http://www.soil-health.org.nz/pasti...lyaug02/soy.htm
http://www.nexusmagazine.com/soydangers.html
http://thyroid.about.com/cs/soyinfo/a/soy.htm
http://www.soyinfo.com/dangers.shtml
http://homepages.paradise.net.nz/rwgully/basics/soy.htm
http://www.thyroid-info.com/articles/soydangers.htm
http://www.soyonlineservice.co.nz/

A couple of quotes from one of the above articles:

" James explains that soy protein is still not legal in the FDA's jurisdiction. "It is only approved as a cardboard sealer, never got legal approval to be in baby foods, and fails the FAO Codex guideline for safe vegetable protein, since it is reproductively, chronically, mutagenically and teratagenically toxic."
"Even ANZFA has found, and kept hidden, in its March 1999 Assessment that it poses a health hazard in sexual maturation, sexual differentiation, foetal and neo-natal brain development, and thyroid function."