[lizma]

Society has the right to limit, discourage or attempt to prevent through law any voluntary behavior, not providing essential societal benefit, that is detrimental/threatening to that society’s continued existence

I agree with you but what if a society has become so self-centered, comfortable and apathetic that they no longer see something detrimental or threatening as a problem?

[A. Goodwin]

Society has the right to limit, discourage or attempt to prevent through law any voluntary behavior, not providing essential societal benefit, that is detrimental/threatening to that society’s continued existence

I don't agree: I don't think homosexuality rises to the level of "...threatening ... society’s ... existence", and given that, there are lots of things that have costs and risks to individuals and society (e.g. drinking, smoking, biking without a helmet, driving fast cars, skydiving, rockclimbing, alligator wrestling, or whatever), but individual liberty is the cornerstone of our society and shouldn't be dismissed too glibly. If 'society' thinks it's going to keep me from drinking a pint of bourbon, smoking a fat cigar, and jumping in the ring with a bunch of gators, then 'society' needs to just eff off! :-)