I'd say stay the #$&* away from Scientology. I have also heard of Hubbard bragging about starting a religion for money, shortly before doing it. He gave science fiction writers a bad name. Fortunately, there are many more who aren't like that. I read alot of science fiction, go to conventions, and all that, but I avoid Hubbard's work like the plague.
I have a friend who's a member of Anonymous, and has been to several protests. He told me that Scientology recently bought thousands of Guy Fawkes masks so they could resell them, and in the process trick the buyers into giving them their contact info. (So, if you're planning to buy a Guy Fawkes mask, buy it at a bricks-and-mortar costume shop and pay for it in cash. Don't buy it online and don't leave contact info.) There's a good reason they're incognito during protests. If you oppose Scientology and they find out who you are, they'll launch a relentless campaign of harassment against you (late-night phone calls, death threats, etc.). That's what happened to my friend. He was wearing his mask, but supposedly they found out who he was because he used his cell phone during a protest. (Possibly because Scientology uses "phreaking" tricks to intercept cell phone calls.) Interestingly, the reason my friend hates Scientology so much is because he's got ADHD and is fully aware he's screwed without his meds. Therefore he doesn't appreciate Scientology's stance on psychiatry and head meds, and its tendency to take advantage of people who really ought to be going to a shrink.