Interesting question. I was raised in a cult, not a hugely restrictive one, but a cult nonetheless. It's true that you will probably get instant social acceptance, once you learn to play by their rules. As a child, I could not know that I was being indoctrinated, but you as an adult might be able to keep your essential self intact behind a facade of compliance... or not. It took me a lot of years to un-learn behaviors instilled in me in childhood, and I still have challenges in that area at the age of 45.
I agree with IV2010; do the research before you decide to join up. I myself would run like hell in the opposite direction, no matter how alone I was. I prefer to keep my own morality and beliefs about how to interact with the world.