Hmm, I'm in 2 minds about this. The best online communities I've been in have been small & come across more human and the thought of "this is a person you're replying to" was innate. On larger forums a nudge towards that humanity might be good but I think this at times goes beyond a nudge and is more of an opinionated telling-off, which a lot of people aren't going to react so well to.

I wonder how this would be as a light touch plugin for the browser that would review a comment in context and possibly help test and refine the content.