[pbreit]

I don't think Google would do a complete or even extensive blackout but I don't think SLAs would be the deciding factor (if Google has (m)any). I suspect if there was semi-consensus internally for Google to do something, it would figure out a clever way to participate.

This is why something like HackerNews deciding to participate matters. Not because of the HN audience but because of the momentum needed to get the bigger guys to go along.