I don't think hubski is an echo chamber, but I've seen it happen a few times on a lot of other sites. A community adopts a certain 'vibe' and then carries that out to extremes, which effectively shuts down discourse, because actors in agreement feedback into each other, while different opinions get squelched or destroyed. And eventually the ONLY content that exists serves to continue the echo.
How can this be prevented? Does anyone have any relevant experiences?