It certainly wasn't a packed ground (the England game clashing certainly didn't help) and Sarries are far from the most vocal supporters, I don't believe that would be disputed.
The idea however that there was fake crowd noise just doesn't stack up to scrutiny either in person or from BT Sport replays. The tweet was posted at the same time that Harlequins' crumbled at the scrum and Saracens secured a penalty that ultimately sent Harlequins back to the other side of London without a losing bonus point. It just comes across as incredibly salty.
Accept the loss, learn the lessons and move on otherwise you won't make the play-offs.
