Euphemism treadmill

In the UK people of a certain age remember Joey being an insult.

This is because Blue Peter, a popular kids show, had a segment on a heavily disabled man called Joey Deacon. Between him and his friends at the care home, they had written a small book, at a few words a day. This, they thought, would endear the disabled to the nation's children, who would see that just because somebody cannot speak or move, they could still achieve something.

The next day, every playground was awash with kids calling each other Joey and grunting at each other.

Blue Peter really did not know us at all.

Except it is not said condition. Because the condition was a misdiagnosis.

"Hysteria" was once a diagnosis for overly-emotional women. It was a misdiagnosis too. And now calling people hysterical is often viewed by those people as offensive. Even if they are being overly-emotional.