We can all sit around and mentally masturbate about how much cheating is going on, but until you have real tech at all races, regional and national, no one knows the answer to this question. Perhaps the rules are pretty good already and they are just not being enforced and that is the main reason for disparity. Bottom line, no sense making more rules until the ones in place are complied with, then you have some data to work with. Start with enforcing the rules and see where that takes you.
Agreed. However, someone said it back somewhere between pages 4 & 10 of this thread it's a manpower & knowledge issue... Example: The NASA Nationals is the biggest and most prestigious event on NASA's schedule... I was given a form to fill out a few weeks prior to this years event to outline what I wanted scrutinized after each and every sessions. It was really a great tool and it was very helpful, but the instructions was very clear, "NO MORE THAN 4 CARS AT ONE TIME. For SM?? Yeah, right!!! I informed them that we'd have at least 10 after every session (and we did), one time the entire 37 car field was pulled in (all had hoods-up, pulled wheels off for brake/hub/suspension inspection then all were weighed - some went to the dyno from there).
My point is, regardless what the event it's management team will never have enough staff to do the work and if they did they don't know what we need done... Remember, even at NASA's biggest event 'they' felt that looking at only a few cars was enough... We know the class and we know what it will take to enforce the rules we have.

Are we organized well enough to collectively to create a document of what to look for and how (procedures)? I'm sure some of this already exists... I know we could at least come-up with one longass list of stuff to check.