"it was posted prior to the start of the event"
Way to demonstrate just how fake the whole thing was. You prepared all the marketing material beforehand, so you could make a point about how "progressive" you are.
Unfortunately, you just underscored how fake all that progressiveness is.
The better way would have been to hold the fiesta, take pictures of actual participants, and post a news blog after. Of course, that does not allow you to run ahead of the news. It does, however, prevent you from smacking your face into the wall of shame, like you did.