The "not submitted by me" is the key point. I submit my own posts when I think they're of interest to HN. I have zero problem with people downvoting or even fla

The "not submitted by me" is the key point. I submit my own posts when I think they're of interest to HN. I have zero problem with people downvoting or even flagging a post that doesn't belong here. But when we comment on the post, we ought to follow our guidelines. As you did, you were able to criticize the post without being rude, mean, or nasty.