In my mind, however, what would be more useful for us budding founders is a place where we can share our ideas and projects in their early embarrassing states. It would be nice the be able to get feedback right at the beginning when I have only the the vaguest idea, and then to be guided by feedback as the project develops and matures. I would not be comfortable to share my pre-pre alpha project on reddit. And people would not be interested.
I believe that the search-space is too great that we should ever worry about other people stealing our precious idea. Starting from one point, different people would diverge and develop in different ways.
I don't know. But I would really welcome more openness. I think when an idea is interesting, and new, people would rather cooperate, and help along. Competition only happens (I hope) when people are chasing after the roughly same fad.