So a girl goes to school, sees you, and decides to single you out to follow and hurl curses at.
I think we're missing part of the story, here.
*shakes head* You kids these days... Probably some silly game she came up with among her circle of friends.
Honestly, I'd try and have as much fun with it as possible.
I remember how stuff like that used to irritate me to no end... but after a while, you realize that they are just words and there's nothing you can do about stupid people.
Nah, don't do that.
The way I'd handle it? Stop, turn around, and give her the time of day.
Ask her who she is. What her favorite color is. What shows she likes.
She will either A) start acting something like a normal person is expected to act or B) be thrown for something of a loop. If she's just trying to annoy you, it may get her to lay off a bit.
She obviously wants your attention. See what happens when you give her a little (neutral attention - not hostile attention or overly supportive).
Or... if you know something you would rather not mention that could cause this girl to act in such a way (or otherwise single you out for such displays), then you should probably take whatever action you need to in order to help heal the damage that has been done.