It may be of the same order, but it is a different thing. No one, not even techies like here on HN, are going to see his actions as valid.

He has to use a different method because obviously he does not have a backdoor into the prime minister's phone. The fact that "obviously wrong" invasive methods have to be used (now) to imitate something that the prime minister want to apply to every citizen (except himself and his buddies) in the future can be seen as part of the point.

Yes, but that also means he both goes too far (for people like me who might sympathize with him) and loses the connection with the original issue, creating his own communication problem. Yes, it is good and necessary to show politicians what they are doing to the citizens they are supposed to represent, but that does not justify all means.

It’s not fundamentally different than indiscriminately scanning everyone’s private communication (what the Danish government is trying to accomplish on the EU level)

I think we'll keep disagreeing on what "fundamentally different" means. Agreed that the Danish gov't proposals are reprehensible and deserve counteraction.