Natural rights are an emergent aspect of human existence. Your failure to recognize that doesn't mean that they aren't part of the underlying substrate of objective reality. Recognition of rights does depend on a value system, but their existence does not.
Your notions of 'bad ideas' and 'good ideas' and 'useful' and so forth, on the other hand, do entirely depend on a value system. If you think that suppressing natural rights is a good idea, you're entitled to that opinion, but don't act surprised when the people whose rights you're repressing decide to organize and wield violence to secure them.
Being a censorious asshole only pays for so long as you can out-coerce the people you're censoring.
Your notions of 'bad ideas' and 'good ideas' and 'useful' and so forth, on the other hand, do entirely depend on a value system. If you think that suppressing natural rights is a good idea, you're entitled to that opinion, but don't act surprised when the people whose rights you're repressing decide to organize and wield violence to secure them.
Being a censorious asshole only pays for so long as you can out-coerce the people you're censoring.