WTF people?

So I show up to the library and am confronted with a choice, sit next to the bums (which I have already posted on) and the WOW players, or sit at these little study cubicle things. I choose the latter. But each one has something on it, some books, a magazine, a pencil carrier, etc. There are like four or five of these each with something on them, no one there. So I move a book and sit down. I sit here for about 40 minutes puttering around the internet and so on, when some girl hovers in front of me, staring me down. I take off my headphones and look at her as she grabs her stuff. I apologize and she continues to stare at me with her snaggle-tooth. I finally, after an awkward time ask if she would like the spot, and she says that "It is hers". I close my laptop and start to put it away when she sits down at the same cubicle as me, (on the opposite side of the partition, facing me) and goes about her business. Ok, first of all WTF!? Does anyone really own anything in a Fucking library? Even if you left something in the library you did own it would likely be stolen by bums in that 40 minute time frame anyway! And secondly, how did you not notice that there was an empty spot litterally inches from your snaggle-face? Bitch really got my goat.