There are bags lying everywhere at Copenhagen airport baggage arrival hall this summer and previously they just line them up by certain area at the baggage claim area. I found someone was holding my bag once in LHR throughout my life, and I was able to get it back from this lady because I got my name tag on the bag. We try to make sure that we arrive before the bags get to the carousel.
Lost bags is fairly common issue this summer, check all airlines' social media pages and you'll see tons of complaints everywhere.
Why would anyone want to take a bag that's not theirs? You have no idea what's in it and if you walk out with it and got caught you are responsible for the contents inside.