The only immediate effect of revoking corporate personhood, either at the state level or by the Supreme Court, would be to cause the legal status of corporations to revert back to that of artificial entities. (We should refuse to use the old terminology of artificial persons.) They could still be represented in courts by attorneys and would be subject to the law and taxation.
However, a whole body of Supreme Court decisions would have to be re-examined. The ability of States, when granting or renewing corporate charters, to restrict harmful activities of corporations would be greatly enhanced. New legislation to protect the environment, workers, small businesses, and consumers could be enacted without worrying that it would be struck down by the Supreme Court.
Most people don't know the Federal Reserve is controlled by the largest private banks. They are using their control of the Fed to destroy the dollar, our economy and wipe out the middle class so they can replace it with a system and currency they have even MORE control of. If we don't shut down the bankers, the Federal Reserve, this nation is history! The Congress can REPEAL THE FEDERAL RESERVE ACT and return control over our currency to "We The People." We have to take back control of Congress and DEMAND THIS HAPPEN in the upcoming election!