I too have noticed a tendency of shutting down / dismiss the "complainers", but it's understandable. Not many people can be objective, especially when they sunk a lot of money in something. You criticize my car, hence criticize my decision, hence you criticize me, and guess what? I have the powa' fool!!! Muahaha!
They can suspend me, I couldn't care less - if that's the kind of forum they want to have where everyone sings Kumbaya and commune with nature.
On a more serious note, I think there are ways to communicate your unhappy feelings, without creating much of a fuss. Here's for hoping!