Well, all perception is selective. We see what we want to see- what we're designed to pursue, etc, for our own interests, etc.. so that we each personally can survive, etc..
Scirra does encourage discussion and welcome users, etc.. But like you say- if we focus on a specific expectation and make it our only concern, then we base all our judgement on the actions/reactions of those specific concerns.
That's natural though, because if we are interested in something, it's necessary to try and grasp it at different angles and dimensions so that you get a fuller picture of the situation..
With multiple users/people interacting, you get a lot of noise and repetitive messages, because we all are perceiving our selective ways and so there's a lot of overlap if you're trying to listen to it all..
Frustration is just a natural result because all action is exhaustive to a certain extent, but we grow from it after we have time to reflect on what happened, do repairs to our mind and repairs to our hurt feelings, etc..