Godwin’s Law identifies the point that a thread descends into mindless abuse, often characterised by reference to the Third Reich.

But more generally, the loss of civility and abandonment of reasoned argument are all too common, especially in the blog commenter nut-o-sphere.

I propose a variant (lemma?):

The “Godwin Limit” is the event horizon for Godwin’s Law – the comment at which a thread is in the gravitational pull of the Law and cannot escape.

Interesting cases are requested.

Some source sites are classed as “exceptional’. These blogs are so egregiously abusive and unedifying that only the exceptions – well reasoned or elegantly phrased comments should be linked. The “Drum” at abc.net.au is provided as the canonical “Exceptional Blog”