Sure, but please just flag submissions rather than posting comments like this. The guidelines are explicit about this:

Please don't complain that a submission is inappropriate. If a story is spam or off-topic, flag it.

If a story hangs around on the front page even after you've flagged it, you can always email us (hn@ycombinator.com) and we'll take a look. That will get our attention much more quickly than a comment.