My shop puts Groo in with the kids comics. I wonder if Groo is a kids comic.
I haven't read Groo in twenty years so I can't really comment. However, this post reminded me of the time I was in a store and the clerks had stocked "Conan O'Brien Presents Triumph the Insult Comic Dog" DVD in with the new "Children's" releases, presumably because the morons just assumed that a brightly colored DVD box with a dog puppet was aimed at kids.