We have investigated the use of ReaxFF, the only alternative MD scheme present in the literature that could be used to both generate melt-quenched glass models and study their mechanical properties. We have reported and analyzed a tendency of ReaxFF simulations to densify the systems, particularly if they are performed in the constant-pressure (N, P, T ) ensemble, making it all but inapplicable to low-density models. Additionally, we have shown that the bulk moduli reported are primarily a function of the density and not of its phase or topology. All these observations suggest that mechanical properties obtained from the use of the ReaxFF force field for ZIFs should be interpreted with caution, and makes a strong case for the use of alternative methodologies, or for the further optimization of the ReaxFF force field.