<i>"I think corporate personhood is one of the most egregious mistakes ever committed by humanity"</i><p>I think you need to look more deeply into the history of human mistakes.<p>I'm not sure how to further answer you and similarly-concerned people in the larger sense, though.  Of all the legal and political problems in the US, I consider the issue of corporate personhood to be deeply trivial, and I'm dismayed and angered that people would restrict the free speech of actual human beings out of fear of a legal fiction.