Inform me if I am wrong, but by definition, HURDLING is defined in the rules as the trackball ball top being positioned just above the top rail of the overpass, or higher. Therefore, unless shooters shoot from that level (minimum height), they are not considered in the act of hurdling, even though that may be the end result of their shooting the trackball. Therefore, it would seem, blocking the shot is well within acceptable defense. At least, that's my interpretation of what I have read.
