Are racy pictures of minors online good or not good?

Apparently a Federal Judge upheld 2 teen girls right to post lewd racy pictures that earned them a year long suspension by the principal of their school. At face value it would be easy to argue in favor of our right to free speech no matter what your age. But would you still support this right when examination of the pictures and captions involved in this case?....

“Prior to the first sleepover, the girls bought phallic-shaped rainbow colored lollipops. During the first sleepover, the girls took a number of photographs of themselves sucking on the lollipops. In one, three girls are pictured and M.K. added the caption “Wanna suck on my c**k.” In another photograph, a fully-clothed M.K. is sucking on one lollipop while another lollipop is positioned between her legs and a fully-clothed T.V. is pretending to suck on it.”

“During another sleepover, T.V. took a picture of M.K. and another girl pretending to kiss each other. At a final slumber party, more pictures were taken with M.K. wearing lingerie and the other girls in pajamas. One of these pictures shows M.K. standing talking on the phone while another girl holds one of her legs up in the air, with T.V. holding a toy trident as if protruding from her crotch and pointing between M.K.‘s legs. In another, T.V. is shown bent over with M.K. poking the trident between her buttocks. A third picture shows T.V. positioned behind another kneeling girl as if engaging in anal sex. In another picture, M.K. poses with money stuck into her lingerie—stripper-style.”

Are the parents of these girls at all responsible for how their teenage kids think and behave? At what point does having complete freedom cross the line of behavior unacceptable for civil society? And who is responsible for enforcing the moral foundation of society?