Diaper Punishment is indeed a real thing.
Diaper punishment does happen to some kids who are misbehaving and the parents force the kid into wearing diapers and using them.
If the child does not want to wear the diaper then the parents will physically force them to wear the diaper by restraining them and spanking them until they comply.
I had a friend when he was 8 years old and his parents made him wear diapers when he got bad grades or if he would misbehave.
His parents would take his pants away and make him wear just the diaper and shirt around the house.
At first he hated it but later I found out he loved it after awhile.
At home he would not be allowed to wear any pants over the diaper and the bathroom was locked
I wish I was diaper punished and if I have kids they will be diaper punished as well when needed.
Here's a link to some photos of a boy around 8 years old who was diaper punished.
There's more photos of this diaper boy at the link below.
These photos are of years ago and the boy in the pictures is likely 30 years old or more.
I wish this was me getting this diaper punishment.