I hate to be that person, but I wish people would stop treating her like a joke. She's a human being and if this isn't all just some elaborate act, there's clearly something really really wrong with her that needs to be helped.
I don't see what's so off about her doing this? All these reports of her talking to herself and doing weird stuff and scaring people, but we've never actually seen any video of her talking to herself or acting strange, besides the one she puts on twitter.
Its at the point where she blinks and people swear she has some problem. I mean if she does then girl needs help, but I don't think there has been any CONCRETE evidence that she's bat **** insane.
And her acting weird on at the gym is not evidence. She's always be a little weird.