Sadly, Kapkao may be right in the US.  Buck v Bell still stands as precedent.  Sad, but true.  It has never been formally overturned even if it *APPEARS* to be dead letter.  The rights of the disabled exist as statute (Americans with Disability Act) and not stully as Court doctrine until that precedent is overturned.  

That is why I will plug the memorial idea again.  It sets a cultural tone that society disapproves of sterilization (and by extension other forms of cruelty).  As society evolves, there is a better chance of a reversal of that precedent.