Seriously, what the hell would Ross, Chandler, Joey, Phoebe, Monica and Rachel have done if they had witnessed the murder of a black man by a dead-eyed cop? How would a hopeless methamphetamine addict have been received by Gunther? How would rape, domestic violence and gross economic exploitation have fitted into the comedic schema of “Friends”? How long would the friends of “Friends” have remained friends if these sorts of issues had suddenly become the main topics of conversation over all those café lattés? There aren’t a lot of laughs in injustice. At least, not a lot of laughs for liberals.