I don't like the feeling that women are an attraction at these types of event. It's like, "OMG there are women here! Make the most of it, because this hardly ever happens!" Then everyone whips out the camera because the sight of another gender doing things is somehow surprising.
You might be reading too much into these photos. There are some photos of women from the front and some from the back. In those cases you have decided that the photos are of their breasts or butt. I think this says more about you than the photos. From what angle should the photos be taken?
It would not suggest examining the minutiae of every picture to determine whether or not they were more concerned with the female form than the event itself.
It would then stand to reason that my observation could be inaccurate. My mini-rant is still free to stand though, since I've noticed that personally, even if it's not sexually oriented.