is diaper discipline/nappy discipline really true

well is it i would like to know I have always been fascinated by nappies etc ever since I was a teen can you tell me your story etc if you don't mind . I think if true it must have been an expensive form of discipline as nappies/diapers cost money and most average families just get by as it is . I could understand corner time naked etc etc or other forms of punishment and humiliation please tell me guys