Lol, I saw that comment earlier but had no desire to wade into the Thatcher debate.
I can't imagine Ruby would be interested in 'You' if it wasn't a gifted screening. That's the serial killer series, right? I saw snippets of it on Gogglebox and it seemed a bit like Dexter. Surely our Roobs would be offended by all the violence and sex? It's very different to Malory Towers.

Though it does fit in with the Erimentha-is-Patrick-Bateman idea.
I think she just got confused when her manager told her about the screening.
Ruby's Manager: "Ruby, just a heads up we need you to attend a Q&A discussion of You."
Ruby: "Oiy LOVE
ME! OIY'M MOIY FAVOURITE SOBJACKT! How long will moiy speech be?"
Ruby's Manager: "No, you won't be speaking, it's for
You."
Ruby: "Ahh, yass, off cwoarse, oiy see. Syo what celabbritties will be twalking about me instadd? Amma Watsyon, Jyacobb Ryees Mwogg and that garrl from Anne with an E?"
Ruby's Manager: "What? No. Look, it's a Q&A for the TV series
You on Netflix starring Penn Badgely!"
Ruby: "They myade a shyow about me and gwot a garrl nyamed Pann Badgely to plyay me?! THAT'S SYO PARRFACKT! OIY LOVV PANS AND BADGES! Althyough oiy rilly think oiy shold have plyayed moiysalf."
Ruby's Manager: "No, look, it's a show about a serial killer."
Ruby: "Oiy syee. Whal oiy haven't killed annyone yat, and oiy awhlsyo rad the DSM chacklist whan oiy was TWALVE and am JANUINELY nwot a psoycypwaahth. Boht oiy syuppose oiy could troiy matthod acting."
Ruby's Manager: "Listen, we just need you to go to a screening of a show you've never watched and never will, then keep lying about how you watch and love it."
Ruby: "Now THAT oiy can dyoo."