I have not accepted any claim that harm can ever be considered objective. We are not at all in agreement, but we have narrowed down the point of contention.
Even certain behaviors that out modern society does call for censorship of - such as calling for violence to a person or group - are not "objectively" harmful, but subject to public opinion. Death threats would generally be considered worthy of censorship, but death threats to Osama Bin Laden in the wake of 9/11 didn't seem harmful. Are death threats and objective harm to be censored, or are they subjective, as I have just demonstrated?
So again, I would like some examples of what you mean by "objective" harm, because I currently cannot conceive of any behavior that could be unequivocally, objectively harmful.