What is the Name

What is the name of
this hideous disease?
What did she do
and now must appease?
Remove all her memories,
isn't that punishment enough,
when your friends ostracize
their contacts, as mental dust.
Go from this life,
leave us alone,
for she won't know you.
Consider yourself gone.
Goodbye our friends,
do not seek us out,
when this happens to thee.