By the way, is there a summary somewhere on FR of what we can’t talk about? If party X is making allegations about party Y and vice versa we’ve come to a pretty miserable pass if we can’t talk about what those allegations are.
It isn’t what topics you can or can’t talk about, it is simply the source. Some are common sense, like racist sites or ‘truther’ sites (often they cross paths), others are because of copyright restrictions.
Here is a list of the copyright restricted sources.