This. When people give spoiler alerts for really old things, I kind of want to rebalance the universe by spoiling the ending of something currently in the popular zeitgeist.
We were B.S.-ing at work the other day and one of our folks whiteboarded (we have whiteboards all over my job and nerds for all different types of things - I don't mean that pejoratively, we say that everyone in our field has their "ism") what they see as the proper way to digest the Star Wars universe and its lore. This included the movies, TV shows (live action & animated), and also through some of the video games interspersed (they left out any canon books, although I believe they've read them).
Any way, they began w/ Episodes 4 & 5 and then took a long roundabout to go through other installments in the universe, then finally rewatching 4/5 way later to reorientate oneself and then 6 and bunch more stuff. It was a well thought out path, which showed a love for the universe and had reasoning behind it. It produced some debate with another coworker who saw some flaws (to put it in perspective, there has been analysis of the Death Star against the framework of analyzing the phases of WMD development for a nation or group; we've got some nerds on our hands here).
But right at the beginning they gave a spoiler alert for the ending of Episode 5 and that they wouldn't say more. I just blurted out to everyone listening that if anyone there didn't know that Vader is Luke's father that that's on them and if they got butthurt about a spoiler alert for a 40-year old movie then life was gonna be really tough for them.
TBF, one youngster gave me a "Hey!" 'cause I think they'd never seen the movies. Oh well.