Ed, there are plenty of penalties in several world religions for demurring and you know it. Catholic children (of which I was one) are brainwashed into thinking that theirs is the only true faith and that hellfire awaits those who dare demur. Mortal sin, remember? It isn't only the authoritarian doctrine, it's the pull of the family and church community too. Believe me, this is very difficult to resist, and it's a facet of faith that the Church is rather glad is there. In many cultures, Muslims who fail to adhere to strict codes imposed by their religion are, er, in deep doo-dah to say the least. It's all very well your saying or implying that everyone of religion is free and unfettered in the matter of turning away, but it simply ain't true. If it were true there would be no organised religion.