Most satellites are intended to break up on reentry, or would whether intended to or not because of how they'd end up hitting the atmosphere and their relativel

Most satellites are intended to break up on reentry, or would whether intended to or not because of how they'd end up hitting the atmosphere and their relatively large surface areas and shape (they're very far from aerodynamic). Kinetic weapons would need a different physical composition (denser material and different shape) and more deliberate manner of launching (or dropping?) than you'd be able to pull off from existing satellites.