Your fake concern is fake noted. That said, the pudge of old would have been able to convey that with one simple sentence and a shrug. This
may be relevant to your interests.
Now, in the interest of avoiding your pedantic tendencies as much as possible, I feel we'll have to define "broadly reported unsourced attacks" before I get started.
For example, I doubt you'd approve of me using a site like Newsmax.com, despite its age and traffic. Which is fine, as they don't actually produce much content anyway. Slightly more problematic are Breitbart and The Daily Caller. For both I'd suggest a cutoff date of 2012 (anything before that being invalid as they were both much smaller then than they are now.) National Review Online should be fine, methinks.
Moving on to talk radio, I would doubt you'd have a problem with sourcing anything from the big three: Limbaugh, Hannity and Beck. To make things easier, I won't bother with any of the others, no matter how popular. (They all have shit timeslots in my market anyway, so I don't really get much of a chance to listen to them unless they're filling in for one of the big boys.)
And, of course, the vast "liberal media" is just fine for plundering, right?