[lorddoig]

Practically speaking, this doesn't seem tremendously useful an idea. Global comment threads are most often a universally repulsive mix of incompatible opinions (case in point: YouTube.) I'll never allow comments on my blog, for instance, because I want to encourage discussions on fora where like-minded (or at least matched intellect) individuals can have a constructive discussion, as happens here on HN.

What would be useful, I think, would be a standard that openly links content to where it is being discussed. I think this would lead to a great surge in discoverability, in terms of both content and communities.

[pc2g4d]

"Echo chamber"? Maybe if we couldn't split into filter bubbles, we'd be forced to figure out how to talk to people unlike us over the long run.

[lorddoig]

I wouldn't describe HN as an echo chamber. It has elements, of course, but the quality of discourse here is really quite high and respectful. I actually read HN; I don't read YouTube comments, and I wouldn't even if that's all there was.