[iPLEOMAX]

They actually do what you are trying to say. It's just that you don't usually see them doing it.

Most Moderators/Admins and staff members of forum do their job perfectly. (Or else they wouldn't be one?)

But they can't browse everywhere each second to detect for spammers, rulebreakers or misplaced topics..
That's why we have the Report button. If you see something wrong, Report it with a valid and good reason for fast action.