[mr_mitm]

I fly out of Stuttgart, Germany, with Eurowings a lot and if it wasn't for the payment process, I could fly completely anonymous, i.e. even under a fake name. Not possible to pay in cash AFAIK, and having a credit card or a checking account under a fake name is much more difficult.

If I even have a bag to check, I present the boarding pass to the machine. After that, there is no thumbprint check, no ID check, no photographs, nothing. Even internationally (within Schengen).

[kwhitefoot]

The thumbprint is optional at Trondheim I think. You can use your credit card instead. It's just a convenience for the traveller. There are no boarding passes.