Groupon didn't "fail", instead it has been astonishingly successful.

However, around the time of it's IPO it was receiving so much undeserved hype that in comparison to THOSE lofty goals it appears to have failed. HN readers at the time were pointing out the hype, and I think that is a GOOD thing.

Nevertheless, I agree that the tone of the community could be better and I will strive to adjust my own comments to reflect that.