I would say it is likely absolutely none of your business and you should pull your head in and not get involved. I saw a Yak 9 inverted today, but I won't be reporting that because I dare say it has already been reported :-) How do you know someone hasn't already reported it, perhaps the PIC for example?
So what did you witness at Narromine Sunfish? Did old mate blow up his portable mattress with the exhaust of his RV again?