Good Morning John:
You are correct, there are MANY "general" rules governing an airshow and there are "specific" rules based on many different issues for that specific airshow and it's surroundings etc. Whenever there is public attendance at an airshow, the governing body (in this country) is the FAA - even if you have military participation..
A pilots briefing is MANDATORY!!! I would hold mine no later than 1 hour prior to show start (I would try for 2) - that way we could get the main briefing done, the individual groups had time to finalize their stuff - and I could get together with each group, and the pilots could get to their aircraft and relax a few minutes before things got going.. I assume you where the pilot in your 2 shows?? The reason I say that is I never allowed "passengers" to participate in the shows - only mandatory crew members... For safety reasons.. However I will also say that a few times I got overruled on that issue - probably because of political reason's!!! lol
Now, I'm not saying they violated ALL the rules, but I have witnessed a rule or 2 broken!!
Example: At a show (as you probably are aware of since you participated in a couple), you have a "crowd line" and you have several "show" lines - which are dictated upon the speed of the aircraft doing the routine - and there generally the center line of the runway. Another words, a small bi-plane (such as a Pitts) can use a 500' show line, a higher performance aircraft (say a P-51) has to use a 1000' show line, and real high performance aircraft (jets) are at a 1500' (or greater) show line. The bigger the airport, the easier it is to control!!! If we where doing a show at a large airport, we would set the "crowd line" at the greatest distance and then change the "show line" for a particular aircraft. You really get tested when you do shows at small airports because the "crowd line" extends all the way around the airport!!! So now you have hangers / houses or whatever to contend with!!!
The performers CANNOT get any closer than that to the crowd OR crowd line.. And that includes whether he / she is making a low pass or at the top of a loop!!! On occasion I had to warn pilots during their routine that they where "drifting" but that was a rarity.
So, whenever you see (and I'm sure you have) an aircraft heading towards the crowd / flying over the crowd BUT inside that distance between his / her "show line" and the "crowd line", A RULE is being broken!!!! BTW, the "show line" goes all the way around the crowd - not just in front of them and then once outside the confines of the airport, you have other rules that apply as well.
Now, that's just one example but it was the easiest one to explain at the moment, and I hope it helped.. I will also say that I had to answer to a "higher up" and as long as he was happy - I was happy!!!
The point I was trying to make regarding this thread was the fact that it didn't matter what was done BUT who did it!!!
Hope you have a great day..
Bill