>>379903413
To achieve change with anything, it'd be useful to formulate some goals for your actions. 
As it stands, you are merely expressing discontent, which is ineffective because it doesn't give people who agree or are willing to compromise a route to effect change. It also doesn't give people an out, which in return could make people defiant, thereby having the opposite of your intended effect.

Also, alternatively to boycotting this event and punishing everyone else already involved, you could boycott future events instead. At least then everyone wanting to help will know what they're getting into.