This is the strongest argument against what the AFL have done to the GWS players. Their staggering inconsistency, in choosing when & who to charge, is a massive problem.
Should the GWS players have been suspended? Probably.
Should De Goey also have been suspended? Definitely.
The fact that De Goey wasn't suspended, and the GWS players were, is a massive problem for the AFL.
Far be it from me to try to get inside the head of the AFL, but I suspect the thinking has to do with this "Wacky Wednesday" function being, at least nominally, an AFL/club event. They're there as a group, representing the AFL, and they pull a bunch of offensive shit that the AFL doesn't like. So the AFL decides to get ahead of the fallout.
Whereas in the De Goey case, I imagine the AFL would be at pains to say, that has nothing to do with us. Let the courts handle that one.
As always, the AFL is primarily (solely?) motivated by protecting their brand.