I think this is just a list of “8 ways you’re an asshole when it comes to wine.” I personally think there are a lot of decent and considerate wine snobs out there. They wouldn’t be caught drinking something they perceive to be beneath their taste, but they also wouldn’t make a big deal out of it.
On our way back from our road trip in Scotland this summer, we stopped at a tiny restaurant not far from home. We order the house wine and it’s clearly an oxidative Jura white (non-ouillé). The waitress declares a Sauvignon Blanc and looks at my wife who tries it and grimaces intensely. My wife proceeds to look at me tasting the wine to see how I will react. She can’t help but lightly smirk. I taste the wine, look at the waitress and ask where the Sauvignon is from. She doesn’t know. I smile, thank her and drop the subject. There was no way anything I would add would improve the situation.
And by the way, the restaurant had posters of la percée du vin jaune plastered on all the walls