It is not permitted to circumvent effective technological measures
Germany has a similar law and unless it was changed it is legal to circumvent ineffective technological measures which means if you can circumvent it it is ineffective, making the entire law kind of pointless, because how would you circumvent something that can’t be circumvented.
The Danish word “effektiv” I believe carries the meaning “not amateurishly put together” so it might be more of a grey zone leaning into illegal still. Some might after all still call a vaccine effective if it “only” prevents 95% of infections against a certain virus and has a 2% risk of certain moderate side effects.
But interesting tid bit as it’s also relevant in a Danish context. I didn’t know about it.