In this articles case, i am the DBA, and of course i can be trusted...

Its a good point though. And a difficult one, when im the one creating the system to monitor myself. If there were more players in this puzzle, i would definitely defer to them to monitor me. But in my experience, it needed to be monitored prior to the other players coming on the field.

This is one way. Obviously other policies and procedures can be implemented to assume that distrust and more effectively safegaurd the systems against those untrustworthy DBA's