The thing about this law or any law in the moral arena is that it can never really get at why some things are done. Why is there an epidemic of inappropriate content addiction? What makes men (and I bet probably at least some women, though obviously not nearly as many) 'resort' to inappropriate content rather than trying to create and maintain healthy relationships with their spouses? On the other side of the coin, what drives the production of this stuff, other than the obvious love of money? What kind of world do we live in where a young girl might think that making these movies is her best option for becoming financially independent or solvent?
The U.S. south is going to do as it does, so I don't think that the law itself is worth commenting on (would I have passed it? No, but that doesn't mean that I'm okay with any of the above), except perhaps to note how short-sighted I think it is to imagine that this is going to make a real change in the people of Louisiana's consumption habits. Just like any of the high-visibility scandals involving prostitution or infidelity (e.g., Jim Baker, Jerry Falwell Jr. and his wife etc.), it will be awkward and embarrassing for those directly involved to be found out, but that alone is not going to stop anyone who is already participating in such things from doing so, because if that were enough then presumably they wouldn't have engaged in them in the first place.