Here in Canada she's one of the most polite people in the campus library. Solely because she's not watching porn, or taking a 30 minute call in the lab during exam week. Or napping at a lab station, or watching Netflix with no headphones while eating, or chilling with 8 people at one lab station.  Yes many of the people who do those things are fatties. Actually she was fidgeting and on her phone, so she might be trying to "subtly" watch porn in public.