  We study the polarization of positively charged $W$'s in the scattering of
massive electroweak bosons at hadron colliders. We rely on the separation of
weak boson polarizations in the gauge-invariant, doubly-resonant part of the
amplitude in Monte Carlo simulations. Polarizations depend on the reference
frame in which they are defined. We discuss the change in polarization
fractions and in kinematic distributions arising from defining polarization
vectors in two different reference frames which have been employed in recent
experimental analyses.
