What's happening to this forum

A short time ago someone called seberri posted an image for comment. He didn't like some of the responses. There was a heated exchange and parts or all of some posts were mysteriously edited without trace, giving rise to speculation that seberri had hacked into the system.
It now appears that Neil, with administrative priveleges, deleted these posts himself without saying anything.
It's just happened again to me, except there was no heated exchange, just the mildest rebuke I could think of and clearly indicated as tongue in cheek with a big smilie.
The entire post has been deleted without so much as a 'How's your father!'