nope.
imo they have as much right to have a crack at a comp there as the search comp years back.
your posts reek a bit of "not in my yard" syndrome. and yet from past posts/profile it seems you are in the tourism industry to a degree, and expose the areas you think are ok to share with a wide crew of people over time (where do you think there holiday snaps go?). they do happen to be other peoples "yards" as well you know.
anyone in water sports that doesn't know gnaraloo already is under a rock. anyone that is a kook that rocks up and it is 6-8' and heaving, or even 4-6' and 25kn+, won't be out there anyhow. and it is pretty bl00dy isolated as stated by posters in the other thread.
personally i think margs main would be better for comp and for getting a live crowd/exposure, but i don't windsurf, so wouldn't know where provides the better comp conditions. if the riders say gnaraloo, i reckon good on em for putting on a show. maybe you can plan a holiday somewhere else for the comp window next year, maybe sumbawa? but ssssssshhhhhhhhh, no photos or video, don't want to over expose it!