Le Pen and Putin probably don't write emails and Trump is tweeting :) But I agree, it is hard to follow the ethics of this, to say the least. Also, if I were sent leaked documents, it would be incredibly hard to understand and consider the ethics.
Or do you mean the recent Vault 7 from CIA etc are also part of this newly found dark agenda, instead of a continuation of earlier leaks such as the Iraq War documents leak?
https://en.wikipedia.org/wiki/Surkov_leaks
Apparently Assange wasn't interested in publicizing that one.