  We demonstrate that the plasmonic properties of realistic graphene and
graphene-based materials can effectively and accurately be modeled by a novel,
fully atomistic, yet classical, approach, named $\omega$FQ. Such model is able
to reproduce all plasmonic features of these materials, and their dependence on
shape, dimension and fundamental physical parameters (Fermi energy, relaxation
time and two-dimensional electron density). Remarkably, $\omega$FQ is able to
accurately reproduce experimental data for realistic structures of hundreds of
nanometers ($\sim$ 370.000 atoms), which cannot be afforded by any
\emph{ab-initio} method. Also, the atomistic nature of $\omega$FQ permits the
investigation of complex shapes, which can hardly be dealt with by exploiting
widespread continuum approaches.
