They’re, well… indiscriminate. Since intelligence operates in secret, I think it’s fairly disingenuous to consider their use governed by guidelines about who can be spied on. You don’t even know who the person is, until you’ve already spied. All oversight will be conducted in secrecy, and we already know that in the US, the NSA they made a mockery of the concept.
We could ban the dragnets entirely, but I can’t see many militaries agreeing to handicap themselves relative to adversaries who will continue to use them. The very best a Norwegian could hope for at a long shot is that Norway won't spy on them, but Norway's allies will and share the intelligence. Also, every other country in the world (and private companies) will be spying on them.
I think this may be a lost fight.