I don't know for sure, but the fact that the pics were removed from this website, and a member claimed to have taken them (or got the pics from someone else who was), suggests that a member of this forum is the source of the pics (directly or indirectly) and is the one who asked them to be removed. If this forum had merely copied the pics from someplace else, I don't think there would be any basis to remove them. That is why the other sites who copied them from here are not going to be taking them down.
Supposedly they were posted on bobaedream.kr originally. Is it not possible that the person on this forum copied them from there? I don't read korean so I haven't tried checking that site.