As a staff member I can say with 100% certainty that I have never heard any mention of such an act - not that it was done, not about what was said in PM's, not about actions being taken against users due to stuff said in PM's - nothing at all. If it is happening, there's only one person doing it and no one else is involved, period. I've sent PM's myself that would be very frowned upon but nothing has ever happened to me.
People who know me can attest I'm the first person to speak up when something seems wrong, I don't try to bury shit or sweep it under the rug. If it was going on, I wouldn't approve of it and I would be very vocal about it.
So like I said, if it is going on (which I do not for a moment believe - present me with factual evidence and not "oh but it said it was there and it wasn't" stuff that anyone could say, true or not - and I might change my tune) it's one person, no one else knows (because if anyone did, they would say something and it would get around - believe me) and it's not being shared. I have to agree that noone would have any interest in reading BlackKat's PM's anyway. No one on staff bothers to mention her.
And as for how people know, the majority of the posters/registered users here are using fake names - no one can be sure who is behind any of the unknown names and they might very well know for a fact.
As for your first comment: I had the same experience as a staff member...I heard people talk about it and I would have the same response...I knew it was *possible* to read PMs on a VB forum how ever if anyone had made any accusations of it (Which neear the end of my time on staff, some of my friends *did* make accusations of vanishing PMs and privacy in their PMs being invaded)...I would and did say that although I knew it was possible I'd never heard anything of it...Members PMs were not discussed in staff areas, and no staff member ever admitted to having read any PM-at least in my presence.
Then, a few months after I left the site for good I got myself a new e-mail address. I occasionally checked my mail at my old address and on two separate occasions I received e-mail notifications of PMs at MTS2...the first time I signed in and saw that there was no new PM, and one of the old PMs I thought was still there was gone (However I'd not signed in for a while so I cannot be certain of this) the second time there was no new PM just like the last time. I've now signed out for good...and it has been months since my last e-mail notification-but my account has been inactive for some time so I am not at all suprised.
And as for you DiscordKitty...I have friends who are still active at S2C and from what I hear you're a good moderator. Shame I never got to know you