This abrupt interruption of her innocent and naive play made her angry enough to run away to stay with Bellocq.
There are films that have been made over the last few decades that were so controversial that they were banned in several countries for the use of young girls in roles that were more suited for adults.
I have not yet done the proper digging on the Gross post, but I have heard that he did alienate Shields and her mother by publishing her images in an attempt to boost his own reputation.