Those people who walked out were doing something illegal because they haven't been registered as "refugee/asylum seekers" - and therefore they don't have a right to walk around freely in Sweden.
Now Sweden is going for another extreme: imposing permanent ID check for all trains coming from DK. It's amazing how they can do something like that - what's the point of freedom of movement? Now DSB threatens to stop all train traffic across the bridge if Sweden wants to burden them for checking ID on all passengers. This is absolutely crazy and I guess they will also put permanent ID check by the bridge.
The Swedish police is not the friendliest people in this world:
http://www.sydsvenskan.se/skane/poli...or-tjanstefel/
Neither is the Swedish legal system, people can be convicted without sufficient evidence.