I read an explanation similar to Poipu's, on the other italian genealogy forum. I'm not sure who exactly posted it.
Maybe we should petition the pope to allow us to film the old church records in order to better "explore & understand" our catholic heritage And also cause i really want to know who my ggg-grandfather's father's name was!
Well, I don't know if this gives you any hope but "the times, they are a changin' " always in Italy. As the older Church administrators pass away and the newer (more progressive) generation takes over you will see many of these Diocese (such as Salerno & Napoli) start allowing the LDS in to film.
I have seen this first hand in Sicily. Nearly all of the church records filmed have been completed in the last 10 years, before that it would have been impossible.