The filtering you refer to may be useful[1] when looking at bulk lists of papers (e.g. when sitting on a hiring committee), but this is an example where the article has already been curated for our attention, namely: by being upvoted on Hacker News. You can still choose to filter it out, but it's silly to write comments attacking the paper based on the journal's impact factor. Better to grapple with the paper's actual scientific content.
[1] (Useful in the same tragedy-of-the-commons way that it's "useful" to leave a picnic ground without cleaning up after yourself.)