Here are the lists from the three seminars (well, two so far ....) of your suggested criteria by which comics can fairly be classified as junk. (Cf. Neil Postman: "the best things on television are its junk."
- Comic books are comfort food.
- Comic books natively are not been -- have resisted being -- didactic.
- Comic books first just are junky.
- Published to a childish level of engagement.
- Socially recognizable as mass produced.
- Absence of artistic unity-closure, framing: non-monumental.
- Repetition of simplistic major and minor themes.
- Socially stratified as junk (ie: similar to Star Trek). Conventionsand collections.
--pleasure, pure and simple
--minimal reading requirements
--small amounts of time and capital are invested (doesn’t time = capital?)
--they are shallow, through and through—one reading, you got it all
--read primarily for escapism
--sensationalism (superheroes), repetitiveness (easy to define the good from the bad)
--marketed as junk
--found on 7-11 shelves
--static and mono-dimensional