i think it's a joke about how much Linux users talk about Linux to people who don't care but reversed.

That's a good recipe for popular posts anywhere on the internet. Anger gets the clicks.

I've met enough Gamers(tm) at lan parties back in the day that I know this sort of unsolicited "advice" is realistic.

edit: People are acting like this isn't realistic. I use to get comments like this because I was a Mac first gamer on my duel boot Mac Pro. Gamers are incredibility tribalistic. Just look at the "console wars" bs.