Rosemary Kennedy is an especially horrendous example. She was not at all disabled but was having behavioural issues (maybe due to depression) and they arranged

Rosemary Kennedy is an especially horrendous example. She was not at all disabled but was having behavioural issues (maybe due to depression) and they arranged for her to have a lobotomy which was the snake-oil-du-jour and it went terribly wrong (though one wonders how a lobotomy can go right) leaving her in a most dreadful state.