How about instead simply removing the legal concept of the corporation as "fictional person" (revoking corporate personhood) for starters?

Might help, but I'm not that fit in law to tell you what the consequences would be.

I think calling a corp. a person only means that you can deal with it as a separate legal entity..
Meaning, that it's the same thing as calling the corp. an "object", as you propose. Any lawyers here?

There's a book (and DVD!) called The Corporation, that explains the advantages that being a person in a legal sense entails for a corporation.
IT means the first paragraph of the 14th amendment applies.
http://www.law.cornell.edu/constitution/constitution.amendmentxiv.html

IOW, a state cannot close down a corporation's operation, nor deny it permission to open up, nor can it seize property in compensation for damage suffered, nor can it decide to regulate a particular corporation to protect its own local suppliers, etc, etc.