You can probably assume that a few of them post on here.
I saw that Matic posted a video of his goal vs Crystal Palace saying it was his favourite in a United shirt and the abuse he received was embarrassing.
This type of "fan" is an absolute cancer not only to our club, but to football. You can guarantee a few of these "fans" actively want players like Young and Matic to play badly when they're on the pitch as they value being "right" more than they do the success of the club. Not nice.