>lag should be a message to a mod if there is something heinous like gore on the front page. It’s used as a censorship button here and that isn’t cool
I mostly agree and that is how I use flag. I've never flagged a submnission, personally unless I felt the site was outright malware (I haven't experienced that here).
But I figure in this case flagging isn't too dissimilar to how reddit will hide submissions/comments with enough downvotes.