By all means, people should be allowed to follow whatever religion they wish to.
The problem is that corporation that is Scientology.
They have forced their female members to have abortions.
They have forced members to disconnected from their families and friends that are not part of the corporation.
They charge you for information.
They are against free speach
They have been known to be responsible for the death of their members.
If you choose to ignore this, they also believe that seventy-five million years ago, a alien called Xenu was the ruler of a Galactic Confederacy which consisted of 26 stars and 76 planets including Earth, which was then known as Teegeeack. The planets were overpopulated, each having an average population of 178 billion. The Galactic Confederacy's civilization was comparable to our own, with aliens "walking around in clothes which looked very remarkably like the clothes they wear this very minute" and using cars, trains and boats looking exactly the same as those "circa 1950, 1960" on Earth. Xenu was about to be deposed from power, so he devised a plot to eliminate the excess population from his dominions. With the assistance of "renegades", he defeated the populace and the "Loyal Officers", a force for good that was opposed to Xenu. Then, with the assistance of psychiatrists, he summoned billion of his citizens together to paralyze them with injections of alcohol and glycol, under the pretense that they were being called for "income tax inspections". The kidnapped populace was loaded into spacecraft for transport to the site of extermination, the planet of Teegeeack (Earth). The spacecraft were identical to the Douglas DC-8 with the exception of having different engines.
(Continued here:
http://en.wikipedia.org/wiki/Xenu#Summary )
Funny that a science fiction writer created a "religion" which revolves around a alien and spaceships etc... ?
Oh, and to finish off... a quote:
"The way to make a million dollars is to start a religion."
- L Ron Hubbard
(Creator of Scientology)