'Course. I automatically assume every book isn't interestin' since I ain't much for readin'.
... But in all seriousness, back when I was a bookworm, no. Naturally I'd assume things based on a cover, but almost never brush off a publication without openin' it up first. 'Less t'was a children's book, obviously. And even then... ya never know. I'd have a few legitimate examples t' link to, but... uh, my memory says no.