brands give the moderators soooooooo much shit if a model under embargo is posted on their forum (even if it comes from a third party source).
As you say, it is naive to think that there will be no leaks and sometimes the barnds themselves orchestrate the leaks but the problem also comes from other meia (printed press or internet) who do not understand why an embargo is not respected and who then point a finger at The Purists.
All this to say that unfortunately things are as they are and if embargos are not respected, even if such breach is free of the moderator's will, it is the latter who will get the shit from the brands!