Furor erupts over PFF's negative grade for Aaron Rodgers' 5-touchdown MNF performance

After NFL analytics website ProFootballFocus (PFF) revealed its negative game rating for Packers QB Aaron Rodgers' Monday Night Football performance, a mob of incredulous NFL fans began urging PFF to (discount) double check its model.
Rodgers completed 24-of-35 passes for 333 yards and five touchdown passes against zero interceptions, good for a 138.5 passer rating. But PFF, which grades every player's performance on every play according to its more nuanced model, saw it differently. Take a look at how Rodgers, who graded a negative 0.8 for the game, stacked up against other QBs in Week 3:
Love me some @PFF but Aaron Rodgers was not worse than Nick Foles, Jameis Winston or Blake Bortles this week. pic.twitter.com/F4BYr7PR17
— Will Brinson (@WillBrinson) September 29, 2015
The comments on that post are . . . interesting.
@PFF If a QB does what Rodgers did and gets a negative it is solid proof your grading is total useless nonsense
— Steve Sundelius (@stevesundelius) September 29, 2015
I know @PFF is smart and all, but I suspect the Packers trading away Rodgers is a knee-jerk reaction they'll eventually come to regret.
— Dave Dameshek (@Dameshek) September 29, 2015
There is no way to justify Aaron Rodgers having a bad game. None. But @PFF does good work — even if you don't agree. I often don't.
— Pete Prisco (@PriscoCBS) September 29, 2015
Aaron Rodgers put ketchup on his pre-game hot dog and that cost him like 11 @PFF game points.
— person (@DashTreyhorn) September 29, 2015
@AaronNagler @BrianCarriveau @PFF I don't think we can take any of their ratings seriously after seeing Rodgers grade.
— jonny (@jonny_N289) September 29, 2015
Aaron Rodgers didn't have a bad game, @PFF just said he had an average game. Probably gave props to his supporting cast. #nobigdeal
— Shawn Ryder (@ShawnGRyder) September 29, 2015
So @PFF grades Rodgers low bc of easy throws/WRs doing the work? Yet Dalton grades out high vs bad BAL DB's? #FAIL pic.twitter.com/O9i0WmX2Bd
— Adam Bonaccorsi (@abonaccorsi) September 29, 2015
The @PFF grade of A.Rodgers reflects only the bad changes & bad decisions of this site (cancelling the premium stats) Not renewing anymore.
— Alejandro Granados (@alex_xxv) September 29, 2015
The Rodgers' grade doesn't invalidate all the great things @pff does but it should lead them to examine everything closely
— Tom Kessenich (@TomKessenich) September 29, 2015
Before the hate goes too far on @PFF , we do love Rodgers. Obviously. @RapSheet pic.twitter.com/dAIRbgQaCj
— Mike Tagliere (@MikeTagliereNFL) September 29, 2015
@PFF just said Rodgers has poor pocket management ?
— Ryan Brennan (@RB16_) September 29, 2015
According to @PFF this guy has a better QB rating than Aaron Rodgers.... pic.twitter.com/r89oxbqK6T
— EROCK (@TheMightyEROCK) September 29, 2015
