I looked around my self and found mostly just restatements of the concept that had no real in-depth explanation of the legal issuses involved. I remain skeptical, especially since some of this seems to be based only on finding similar sounding words like "birth" and "berth" and trying to make something out of that.
The US is not a corporation under the common legal definition of that term. The US is a representative democratic republic with a national constitution that explicity grants us our freedom. I do not see any evidence of US citizens being treated as property or denied their constitutional rights by our government. When that does happen, people have legal recourse to correct the situation.
I would be willing to accept this as true if there was some valid explantion offered as to how we are not being governed acording to our constitution. This all seems like inuendo. I would need to see some evidence that maritime law could and/or is being used to govern us in place of the constitution.
Regards, Canis