It can be disappointing and that's why sometimes I don't take part in conversations in a self moderated topics if I don't think that the OP is reliable enough.

Closed topics can be felt as provoking, but if it is an important topic you can always start a new thread for it by yourself. Once I did so, because I was sure that the topic is important enough, my new topic has over 10 pages already.

So as long as we have an opportunity to overcome both this actions, I don't think we should give it a lot of importance. If we talk in general.