Michael Anthony Horrigan
More Cowbell Pictures
No weapons would be even better. 
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I think we had 11 in this fest that died or were dead plus a spaceship full of aliens (umpteen) of them.
Hmmm, have we had a fest where not one single person died?
Id certainly go for a no weapons / no death fest.
... to have the requirement that "no one will die" in the fest I think is intriguing. .
It could be called SnoozeFest
To play devil's advocate, how about Death Fest. Every single character introduced in the film must die.
Oh wait, that sounds like all my films.