I live in Cali, and about 5 yrs ago a very good friend of mine basically moved down there to Florida for about 3 yrs, and lived in some Scientology compound. He wasn't allowed to have any contact with outsiders. He would call me from time to time on a payphone, and would talk low, like he didn't want anyone to hear.
It was really odd. He couldn't have a cell-phone, and his free time was very restricted. He wasn't even allowed to write letters to friends or family. He said that they told him it was best to have little contact with outsiders in order that his studies weren't hindered. When I asked him what his eventual goal was in this, he said it was to "Gain Knowledge". But he didn't specify what kind of knowledge.
He's been back for a few months, and this post reminded me that I should get in contact with him. Find out what he learned, then Destroy it.