Okay, so I've been lurking on the LG15 message board. The religion discussions in there are BRUTAL. People are getting positively wrathful over fan speculation of a fictional girls religion..... Check it out.
Note: Please do not invade their forum, this is just something I'm fascinated by
For those of you who don't know what lonelygirl15 is, here's the partial wikipedia entry.

"lonelygirl15 is a fictional video blog that came to international attention via YouTube, a popular video sharing website. The central character is a YouTube user of the same name, although she is commonly known as Bree. The character achieved massive popularity with her series of videos, which acquired over 15 million cumulative views. But after viewers grew suspicious (see Initial speculation), lonelygirl15 was exposed as a fictitious character played by New Zealand actress Jessica Rose.

The central themes of their video blogs are:

* Unrequited love/romantic confusion - Bree is unsure of how to react when her friend Daniel confesses that he 'likes her'.
* Rebellion against parenting - Bree is homeschooled by parents who she implies are also strictly religious.
* Forbidden experimentation - her parents are apparently unaware of her video blogs.
* The Occult - Bree has a picture of Aleister Crowley in her bedroom, and she is involved in preparing for a 'ceremony'

There are also other recurring motifs in the videos. For example, the phrase "Proving Science Wrong" is repeated on many occasions, often in reference to her spirited science experiments with Daniel.

In the blog entry "Swimming," Bree refers to an old friend named Cassie. Since a second female character was listed in the project's initial casting call, the character is expected to appear at some point. Some videos called cassieiswatching have appeared on YouTube, however the lonelygirl15 creators claim to be unconnected.

In one episode, the family's religion is revealed as the Order of Denderah, and "Denderah" is one of the keyword tags on the blog. Bree is learning the secret language for an upcoming ceremony."