Where did you see here private information?
there are some private information published like the two accounts of that guy for example , also I see every time someone wins decent amount and ask for withdrawal you post the tx id here
some people may don't like such info of them being posted in the forum and you don't need to do it anyway
Basically it is OK to publish big win from their players but of course it will be better if the site ask for permission first from the player. Regarding posting tx id of the withdrawal, I have to agree that it should not be published as it is so private information but as what I say that it is OK as long as the player permit the site to publish it. Probably the reason to publish the tx id is to give a proof for readers that the site is really paying, understandable reason IMO but still the main important thing is about player's permission.