Look at the posting history of the comment posters, not just the comment. In many cases it's not the particular comment, it's the particular poster who is shad

Look at the posting history of the comment posters, not just the comment. In many cases it's not the particular comment, it's the particular poster who is shadow-banned, and all of their comments are dead on arrival (to everyone but themselves, the definition of shadow banned). But people with showdead=true and enough karma can vouch for them to resurrect them if they're worthwhile.