That would explain it!
In absolute terms, no, but I think Leone was grading on a curve.
I meant, if they rented it just by hearing the title and nothing else- if they saw the box with Val Kilmer in modern clothes and still thought it was a gladiatior movie because of the title, agree, they would be idiots 
For years I assumed Glengarry Glen Ross was some sort of 19th century society period piece when I knew the title and nothing else about it. Oleanna as well.
I read an article by John Irving about writing my favorite modern book “The World According to Garp.” He talked about how he kept moving up the only sentence that has the title of the book in it. First it was the start of the second chapter, then it was moved to chapter five, then chapter eight, and so on, until it finally became the last sentence in the book
Because in the World According to Garp, we are all terminal cases.
Sophie’s Choice (which my wife and a former girlfriend both abhor). You don’t learn what the choice is until very near the end, as i recall. I assume it’s the same in the book.
A couple in which the non-obvious title of the movie DOESN’T mean what the author intended:
I haven’t read either of these.
But I gather that the meaning of Stephen King’s Hearts in Atlantis has nothing to do with that gratuitous game of cards they throw into the film.
Similarly, through my reading about The Golden Compass, I learn that his original title was to be The Golden Compasses, referring to some drawing implements. He later changed the UK title altogether, but the American publisher apparently turned it singular, assuming it had to do with a magical direction-finding device. The movie apparently sticks with this interpretation, which isn’t the author’s at all.
Are we talking about books now? In that case I should mention The Catcher in the Rye.