Betsy
I don't know if walking away is the correct thing to do.
Most organisers are reasonable and wherever possible try to put things right.
I would much rather listen to somebodies complaint on a personal basis and try and put that right, than have them walking away dissatisfied.
If I go into a restaurant and I am not happy with the meal or service, then I go and have a discreet word with the person in charge and I have to say the situation is normally put right without any further problems.
Les