As for the rules debate; I totally understand that it is possible to run any race, anywhere, using any rules that you want. My question is, why would you? Most people racing at this event are used to racing under RRS, and when boat-on-boat situations arise, will probably expect the other boats to act accordingly.
Moreover, in this case, the event flyer says:
There is no Race Committee.
There is no Protest Committee, so please obey the racing rules (my emphasis) and rules of the road.
How is this intended to mean that the RRS do not apply? What other racing rules are you invoking?