Directing/voting/etc. no G days could be considered to be industrial action, which is why it is being reserved for actual industrial action.
In the meantime, just as we are fed up with the guys who put up their hands up to be training captains, training FO's, freighter captains, management pilots, port page volunteers, RTPC sim trial volunteers, TV commercial volunteers, etc., we are fed up with G day workers who are working against our goals as well as saving the company money by taking it from pilots' pockets.
I think that expressing this frustration and exposing the stupidity of G day volunteers is a good thing. However, we must be careful to avoid a witch hunt because not all people working on G day are really "voluntary G day workers." This is often the grey area the damage causing volunteers try to hide behind, though.