Her hunt for an identity makes her identify as "aspie" when the problem is really her overall mental state. She probably has a long history of taking entire communities hostage when trying to forcefully mold them in her own image. This is an aggressive borderline/narcissist behaviour but she seems so tragically unaware of it.
I LIKE that, you're GOOD 
But I would still venture to suggest that her only "Borderline" element could come via a similar, but different high profile bitch from hell called AJ Mahari, who spent years hiding from an actual DX of AS in falsely representing herself as "the face of BPD" and trying to assert herself as the "world's foremost expert" on it, and define it for everybody else...which, of course lead to a situation where anyone with AS could relate to every word AJ Mahari said to describe BPD...
...but there is another layer there too, as behind her self reported "BPD" attributes, I had recognised two distinct diagnoses in AJ Mahari by the end of 1998.
- Narcissistic Personality Disorder
- Being easily the rudest, most self absorbed, person I have ever met
Still interested to know why you think there is "B" in with the "N" PD...
Someone with NPD is totally dependent on the presence and attention of other people in order to have a sense of self, and that need being satisfied would be inclined to weed out anyone the felt invalidated them. Someone with BPD fears abandonment and would surely be more inclined to stalk and cling than to banish?
Y'know, bottom line is that SB is probably just another common or garden psychopath striving to avert the constant boredom of reduced affect by manipulating people like chess pieces.
I guess you're right about borderline usually involving clingy behaviour. I based my assumption on her extremely black and white view on reality and clearly emotionally unstable behaviour. She seems like a wreck in many ways, it's clear she doesn't know where she belongs or what she is. This is also borderlinish imo. She also seeks groups of people to manipulate, control and force to respect her. Of course it also fits somewhat well with narcissism from my understanding of it.
I've dealt with borderline people, and she reminds me of them in some ways. When you fail to please them, they don't hesitate to cut all ties in the blink of an eye. To them, completely ignoring/banning someone would be the ultimate punishment. Despite being the clingy type, borderline people usually seem to have an "ignore button" IRL which they push when they need to avoid rational thinking and self reflection whereas narcissistic people would me more likely to hammer their greatness into others in a more direct way, "you WILL listen to me because I AM a fucking GOD okay?", even when they are cornered and have all evidence against them they make fools of themselves by stating openly how right they are. A stereotypical narcissist losing his temper usually goes "do you even KNOW who I am?" while a borderline person goes *smirk* "ignooooore!"
I think she might have a combination of BPD/NPD.
ponds from now on.