What a load of populist bullsh*t.
How could you guys possibly oppose this? It's not forcing the families to say anything, it's forcing the criminal to see what they have done. I am glad my step-uncles killer got to hear the victim's widow "cry bitch whine and moan" at him for a half hour.
Whether you think this is appropriate depends upon whether you think the primary purpose of the criminal justice system is to punish, contain, or reform criminals. While forcing the criminal to be pilloried accomplishes the first, it does nothing for the second and it is debatable whether it helps or impedes the goal of reform. That said, I'm somewhat old school and wouldn't mind seeing the pillory and the stocks brought back for minor offenses, provided the convicted are kept from being physically harmed by the onlookers. It was the failure to do that in all cases that led to their abandonment.
Facing one's victim's would be a lot more of an inspiration to reform than just about anything I can think of, and may provide a way for the victim/family to come to terms with the situation and even enable the process of forgiving and reconciliation if that is something they are willing to do.
I don't know that it would be appropriate in all cases, but in general this is a good idea.