TV3 is being accused of striking a new all-time low in broadcasting standards.

Family First is lodging a formal complaint over an item featured on the late night news show Nightline. It featured naked men in training for the annual nude rugby game in Dunedin.

Family First's National Director Bob McCoskrie says the images were full-frontal, and there was no attempt to pixellate them. He says it is meant to be a news bulletin and not an R16 movie, and the network has crossed a dangerous line.