O/T Arlington-what were the parents thinking?

they need to get control of the children out there, they aren't going too, though until someone runs onto the oval and is trampled. this is not a rzce track feel, its more of a trip to the beach or the zoo, too many moms and kids running loose, thats fine that they are there, but they need to put them in a section away from truble.
what would happen if a toddler ran onto the paddock and a horse reared up and stomped him ???