Prem Kang's suggestion of immediately limiting the future posting activity of anyone who removes posts without valid cause is excellent.

Strange though it may seem, it appears from observation that limitations in the background architecture of the site prevent adequate scrutiny of individual's activities so a sort of confusing low level anarchy reigns.

Get it sorted MA. Your web developers should be able to deal with this quickly and if they can;t - get William Reed to sack them and employ someone who knows what they are doing. I can point you in the right direction if you're short of potential take over candidates.