Stare or scowl at the person breaking the law
If the person continues to break the law,
scowl and cough demonstratively
For severe infringements, you may stand up and leave,
possibly whilst mumbling your frustration
Norwegians avoid conflict
They will get frustrated,
but will not directly confront those who disobey the unwritten laws
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This is one of the 100 Unwritten Norwegian Social Laws presented in our new book "The 100 Unwritten Norwegian Social Laws"
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Read more about our amazing Norwegian friends in our other Guidebooks to Norway written by Julien S. Bourrelle and Sean Percival.