This is incorrect. The forum staff has never said that we can and do view direct messages, and we have never done so. We have never been able to view direct messages that we are not in.
The only way the forum staff can see a direct message is if a post in a direct message gets reported, yes, we do see that one post. Or if we are invited into a direct message - in which case, everyone in the direct message can see that we are included in it. We are not and cannot look into your direct messages.
Having said that, all posts on the forums - including direct messages (even if they don't include a forum staff member) - are subject to forum rules.