Man, this makes you wanna just freak out! Not because any "sharp objects" can be carried on board but because there is such a fuss made out of it.
I always ask myself if people responsible for security measures believe that any potencial criminal is as stupid as bread... If you have the intention to kill someone or do whatever others would not like then no safety regulation can help out. Only the stupid depend on killing with knives (and thus would not do so if they are hindered of carrying one on the plane) but a smart guy wouldn't depend on it and use any object which is on the plane anyways.
Why not also ban pencils, pillows, magazines,... Hey, ever thought of using your PTV as a weapon?
In the current state security is only preached but if there is anybody who has the desire to cause trouble he will be able. Sad but true.
Besides that, CPH
is one of the greatest airports to hang out between two flights, it's quite cool what they all offer in the transit zone.