Laura was dating Christopher Masterson (from malcolm In The Middle) and bnoth he & his brother Danny are Scientologists. I don't think Laura ever officially joines, she was pretty much forced/coerced because of her boyfriend. Like all good cults (think Mormons, evangelical Christians, Jehovah Witnesses etc) members are supposed to bring new blood into the fold. The richer they are, the better.
I've read that laura no longer participates since she & Christopher split up, but who knows.