It's a bad habit since it encourages commenting before reading the submission. But I do the same thing as well, and it's not clear to me how someone could do ot

It's a bad habit since it encourages commenting before reading the submission. But I do the same thing as well, and it's not clear to me how someone could do otherwise without spending extraordinary time on HN. I find HN a very valuable source, so scanning some amount of comments is more important to me than reading all the submissions.