The way I do the equivalent of what you are doing is write up something in various stages of "less than fully baked" and send to someone I know is interested/I respect in private, and have a chat about it. What's nice about that is it exploits the threat of embarrassment of outputting nonsense to force me to at least "bake" it sufficiently to have a meaningful conversation about it. It's very easy to output nonsense.

But I am skeptical regarding the wiki model of generating good novel stuff -- there's too much noise.