Gravity and Orbital Mechanics - Physics 101 / AP Physics 1 Review with Dianna Cowern

So should Romeo Zt547, a super rich alien kid, one day decide to show off with his brand new spaceship with unlimited power and pass earth at the speed of light (in vacuum) just to impress you, he would pull earth out of its orbit and kidnap not only you but all of mankind? I mean inertial mass= gravitational mass, right? Shouldn't the spaceships inertial mass  be much higher than earths gravitational mass? Do I need to worry?