The whole point of asking those questions was to display the problem of demarcation and why it is not as simple of an argument as "the bible says so". For the most part, people are not against polygamy for religious reasons. They are against polygamy because they see it as a possible erosion of societal values. Whether or not you agree with this, do you understand why it is a reasonable thought?
I think you misunderstand my position; I am a pretty hardcore libertarian. I think you should be able to do anything you want (even if it is harmful to you) as long as it doesn't hurt anyone else. And I mean pretty much literally hurt someone else. If something you do is "offensive to societal values" or offensive to a particular person; they should stop bitching and deal with it. I think polygamy should be legal; all drugs should be legal; alcohol should have no age restriction; people should be allowed to get abortions or married to gay people if they want; etc. If it doesn't hurt me, you should by all means be allowed to do it.
Also, the fuck is with this SOPA/PIPA/ACTA shit? The internet is fine how it is. It doesn't need any regulation.
And wtf is with this NDAA act? Indefinite detainment is now legal? I take issue with that also.