Spoiler etiquette?

Am I the only person here that is getting frustrated with the complete lack of spoiler etiquette here lately? Seems like in every thread, people are just posting detailed spoilers from The Long Game without any tagging or warning and no one seems to care at all.

Is it not reasonable to want to discuss the TV show on a subreddit called "HeatedRivalryTVShow" while also staying spoiler free for the next season?

It seems like it is to a lot of people. I'm honestly about ready to just block the sub.