@jwz @anildash And to be clear, I say this to describe my own ruminating--I'm not sure I have an answer here.
But, like, "We promote the best writers; see these Nazis on our homepage" feels quite different to me than, I dunno, "We issue TLS certs, and some of those certs are issued to Nazis."
There's probably a bunch of shades of gray between those two extremes.