The bit of social media people use to talk to their IRL friends and family will be fine.
But the bit of social media where people are listening to celebrities, getting their news, sharing memes, discussing common interests? It might get flooded with bots so convincing as to be indistinguishable from normal users.
It's as soon as it learns that X celebrity is dead generates clicks.
Then folks will learn not to trust it just because it is a computer once everyone is announced dead, and everyone will have to make claims that they aren't.
But the bit of social media where people are listening to celebrities, getting their news, sharing memes, discussing common interests? It might get flooded with bots so convincing as to be indistinguishable from normal users.