Well going by what little info is given at the top of the article they're chosen by the ALA and are just banned from classrooms and I'd assume school libraries.
What I've always found annoying though is that a lot of these books are banned for things they share in common with other forms of literature. It just comes down to the fact that comics and graphic novels, no matter how progressive we've become, will always be looked down on by "literary types". What's really sad is that they don't see that comics for many young kids is a great foot in the door for an interest in reading. I know when I was a kid I read comics and Goosebumps, which lead to reading stuff like the Hardy Boys and then progressively more adult reading like Hamlet and Macbeth once I got to high school.
I wish they expanded more on the reasons they gave for each book rather than just listing reasons.
Esspecially since I want to know how Watchmen is "Innapropriate for it's age group."
I'm assuming they think all comics are intended for children
Sheep Cannon: (noun) A cannon discreetly disguised as a harmless sheep.
Usage: See issue Deadpool #16: Assignment in Greece
I hate you Grant Morrison, your package, and everything about you.