Examples of productivity porn include but are not limited to: reading a tweet by a top VC about how to become a better startup founder; watching a Youtube video about the 7 mistakes you need to avoid at the gym; perusing a Hacker News thread about how to improve the code you write.

I've abstained from most social media but do still consume hackernews. A small portion of articles I read involves in productivity tips (like this one). I do not know how effective most of them are, but I don't think they're completely counterproductive. One of the most life-changing practice is time-blocking, which I also learned on hacker news. Over the years the time time-blocking afforded me is enormous.

So in my opinion, it's not always a bad thing to learn about these. Sometimes I need to know about, or at least need an affirmation on a better way to do things. And adjust myself for that, because otherwise it's no different from reading a junk novel.

Also, no need to befoul of pornography. They're a lot more useful and productive than social media!