Wow, doesn`t anyone have property rights anymore?
Animals should not (actually they really cannot effectively) "have rights".
However, humans have a responsibility to animals in our care. It could be said that we also have some responsibility to wildlife, as unthinking action on our part could have significant impact on them as well.
Bothrops ammodytoides (Patagonian Pitviper) or Thamnophis sirtalis(Northern Red Sided Garter Snake) might be a bad idea if Norwegians are in the habit of releasing captive animals but, not much else comes to mind that could survive and is not indigenous to the area. I could be wrong and will no doubt be corrected if this is the case.
That leaves disease introduction as the only other valid concern. And, that would be easily addressed by quarantine and health checks by vets on all new imports.

All I can suggest is pet reptile enthusiasts team up with pet related businesses and lobby for reasonable changes.
Good luck.