Like the Dish, Mark Kleiman is against it:
It seems to me that showing someone in manacles is a visual statement of guilt. Even putting aside the physical discomfort and personal humiliation of being cuffed, arranging for that photo to be in every newspaper and on every TV news show is an especially vicious and unnecessary form of punishment without trial. … Even in cases where the cuffs are necessary, showing someone in cuffs isn’t. And it ought to be against the rules.
The Dish 