This stinkfest reminds me of the joke of the AF guy relating a duel with a Navy squadron: "So we agreed to meet those bastards at 20k the next day...and would ya believe those dirty cheaters showed up at 25k? I swear if we hadn't been at 30 we mighta lost that fight..."
I've had a little exposure to 10v10's in the past. In my experience the pucker factor is similar to that of a scenario, except these events are characterized by such a brief, short burst of violence that nerves get a little more frayed. Unlike scenarios, there is no time for guys to work out the butterflies. So you've got 20+ guys in high performance war machines bearing down on each other. It's not surprising that ROE can go out the window in an instant. It's not necessarily that anyone intended to cheat...it's just that when hurtling towards that merge you enter the twilight zone and sometimes wierd things happen.
I do not mean to tell you guys how to throw your own party, but the event may flow better the fewer rules there are. My squad's philosophy was to turn these things into a street fight as quickly as possible. I mean who likes rules anyway? If you go in expecting utter chaos there is less chance of being surprised

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Anyhow...if I may suggest trying the old, "we'll meet you punks in sector X,Y. 20k ceiling. Everyone within 2k of each other. Once the shooting starts its jokers wild. Last man standing wins."
This should prevent one side from coming with a Daisy Chain formation.
Hope you gents work this out, I think the 10v10 event has a lot of merits. We all like that rush right before the stuff hits the fan. It makes all that arena time putting up with ackstars and altmonkeys worthwhile.
-Hornet