I don't know where 'Spoilers' really became a thing but telling someone the ending to a film has always been bad manners, surely?
I also find being told theres a twist completely takes you out of the movie and instead has your trying to out think it. I don't like trying to work out plot twists I like to be surprised.
The question about giving a spoiler to get someone to watch it is interesting. I made a short called 'Flat Footed Apocalypse' which has a banner on this very forum (Thanks Teague!) Now the image I used to promote the film is a bit of a spoiler but what makes the film work is that it plays on expectations. For the record this is a STUPID way to make a short because you can't get anyone to watch it without telling them it's not the generic thing you make it out to be.
I also did this to myself with Fringe, I'd seen the pilot but not been hooked and around the time s3 was airing I read the revelation from the end of s1 which intrigued me enough to pick up the dvds.
The worst spoiler for me was starting my first job in a cinema. We weren't allowed tickets to The Dark Knight and (somehow) I managed to go a whole month without hearing a word about it and when finally the embargo was lifted one of the managers strolled along the counter announcing in the most devonshire of voices...
Heres a question, does anyone seek out spoilers for any movies or shows?