IMO the person that gets to post the thread should fit a few criteria.
They should have donated or in some significant way (not just posting in a thread) contributed to the movement that will ultimately get Pioli fired.
From there, it would be nice if there was a pool of posters to narrow it down to further by eliminating the ones that have been around the whole time Pioli has been in KC and narrowing it further they shouldn't be supporters of the failed regime.
That would probably narrow it down to a handful of guys give or take a few.
The trouble with some formula like this to determine what would be "fair" is that the news that he got the axe could come at any time and these posters may be asleep, at work, fisting their grandmother, watching Batman or multitudes of other stuff.
The only fair way to determine who should post the thread is probably first come first serve because otherwise, we might be hours behind other sites in posting the news.