CPH loaders have long been rather bolshie on this, the precious little flowers. It wouldn't be so bad if they were as quick to plug in the conditioning air as they are to get snotty about an APU running, and if your company don't or won't pay for it the "quiet" policy quickly produces a sweatbath or worse, in winter with doors open an icebath on board. Perhaps pilots should reciprocate the bolshiness? As with so much scandawegian idealism it may be a nice idea but it has major flaws in practice.
Having said that CPH is an eerily quiet place because of it.