Recommending that other people avoid a certain page because it contains "strange posts" without further elaboration is definitely inviting the "unnecessary callout" remark.

As HackerNews is a discussion site, not your personal blog, some further elaboration on why you consider the guy's posts "strange" (and why you even consider "strange" being a bad thing in itself) would be in order.

You've been quite unspecific in expressing your opinion: how can we evaluate your suggestion of not browsing that guy's feed without actually browsing it to find out what "strange posts" means to you?