A few comments for minimus:
: "As long as they behave themselves:".....That can get sticky. Do you want the government to determine this?
Yes, because it is evident that religions cannot police themselves. Look at the recent scandals in the Catholic, Mormon and JW churches over child molestation. When a religious group's self-interest is at stake, they always come down on the side of self-interest at the expense of individual rights.
: What boundaries will be exercised?
Whatever boundaries ethicists working with lawmakers and the courts decide, that will prevent the evident abuses we see today from continuing to occur.
: Will we invite a police state?
No.
: I'm very uncomfortable with the government keeping check over religion.
I am not, as long as it is kept within proper bounds. Religion cannot do it, and no one else has the power.
: Who is so ethical that they can be the guardians over others?......
Humans do the best they can. Religion has failed miserably to protect people from religious abuse. Secular states such as most western democracies have proved far better at doing this than religions have. No human organization is perfect, but in this case I'm saying that we need to choose the lesser of two evils.
Let me ask you specifically, minimus: What do you think ought to be done to prevent a particular religion from practicing child sacrifice? Do you think government should get involved? Should it get involved only to the extent that, after children are killed, it will prosecute the murderers? Or do you think government ought to prevent the teaching of such beliefs up front so as to prevent children from being killed in the first place? Explain your reasoning and elaborate on the ethical principles you invoke.
: Obviously, we all should practice good ethics.
That's the whole point, isn't it? And what does human society do with people who habitually do not?
AlanF