The setting? Someone posted a class picture of kids acting like... well, kids. One of the kids is giving the camera the finger x2.
The wank? _falnfenix_ mentions how her class when she was a kid was too scared of the nun to flick off the camera. Not exactly wank worthy until sakurabana1 chimes in.
OMFG, IT'S FLIPPING, NOT FLICKING! YOU IGNORANT PERSON!