The built in protection is the exact same mechanism for ratifying Amendments proposed by Congress: 3/4 of the states must approve any proposed amendment or else it fails. Seems pretty straightforward to me. Horner seems not to understand or is ignorant of the meaning of Article V "The Congress, whenever two thirds of both Houses shall deem it necessary, shall propose Amendments to this Constitution, or, on the Application of the Legislatures of two thirds of the several States, shall call a Convention for proposing Amendments, which, in either Case, shall be valid to all Intents and Purposes, as part of this Constitution, when ratified by the Legislatures of three fourths of the several States, or by Conventions in three fourths thereof, as the one or the other Mode of Ratification may be proposed by the Congress..."

Any Amendments proposed by a Convention of States must still be approved by 38 States, just like Amendments proposed by Congress. Congress has proposed 27 amendments over the centuries and made at least 1 mistake that had to be solved by another amendment: 18 and 21. Do you trust Congress to pass any proposed Amendment to limit their own powers or to limit their terms in office? Only a Convention of States can hope to propose limitations on Federal power. And we're protected by the Constitutional requirement that 38 states approve of any proposed amendments, meaning only 13 states can prevent any dangerous amendments simply by doing nothing - not approving them. The author Thorner has not thoroughly investigated Article V, which says: "The Congress, whenever two thirds of both Houses shall deem it necessary, shall propose Amendments to this Constitution, or, on the Application of the Legislatures of two thirds of the several States, shall call a Convention for proposing Amendments, which, in either Case, shall be valid to all Intents and Purposes, as part of this Constitution, when ratified by the Legislatures of three fourths of the several States, or by Conventions in three fourths thereof, as the one or the other Mode of Ratification may be proposed by the Congress..." Even a so-called hijacked convention still faces all the states for ratification, just like Congress' proposals. People need to stop wringing their hands and biting their nails and step up to solve the problem of over-reaching invasive Federal power.