Just because Bt occurs naturally in some soils is not a reason that it should be applied helter-skelter.
This is why it is dangerous to allow ignorant folks like you access to partial information through propaganda.
Elections are dangerous times. Get educated, please.
Why is the organic industry allowed to spray it on all of the crops, if it is so dangerous? It is an approved natural pesticide and can be sprayed freely by the organic industry...you obviously have no clue about the science of Bt or even that it is a natural bacteria. There are hundreds of link about Bt and use in the organic industry, here is just one http://organicgardening.about.com/od/organicgardeningglossary/g/bacillusthuringiensis.htm